halstead Eden CBX 24 Propane User guide

751030 MANUAL (NEW) 21/9/10 08:39 Page 1

CBX 24, 32 & 38

Eden X Type

SBX 30

INSTALLATION AND SERVICING INSTRUCTIONS

TO BE GIVEN TO THE USER

0086

EC 87/BP/35

G.C. Appliance No. 47-260-05 (Eden CBX 24)
G.C. Appliance No. 47-260-04 (Eden CBX 32)
G.C. Appliance No. 47-260-14 (Eden CBX 38)

G.C. Appliance No. 41-260-13 (Eden SBX 30)
G.C. Appliance No. 47-260-07 (Eden CBX 24 Propane)
G.C. Appliance No. 47-260-06 (Eden CBX 32 Propane)
G.C. Appliance No. 47-260-15 (Eden CBX 38 Propane)
G.C. Appliance No. 41-260-16 (Eden SBX 30 Propane)

COMBINATION AND SEALED SYSTEM CONDENSING BOILERS

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CONTENTS INTRODUCTION

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

1.1 Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INTRODUCTION

1

2 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.1 Gas Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.2 Performance Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.3 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.4 Overall Dimensions & Minimum Clearances. . . . . . . . . . . . . . . . . . . . . . . . . 4

2.5 Concentric Air / Flue Duct Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.6 Specification for Open Flued B33 Applications . . . . . . . . . . . . . . . . . . . . . . . 7

2.7 Specification for Twin Flued (Type C53) Applications. . . . . . . . . . . . . . . . . . 7

2.8 Additional Concentric Flue Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.9 Appliance Hydraulic Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1 Statutory Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2 Appliance Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3 Flue Terminal Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4 Ventilation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.5 Condensate Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.6 Gas Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.7 Central Heating systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.8 Domestic Hot Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.9 Electricity Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.10 External Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4 Appliance Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.1 Unpacking The Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.2 Preparing The Wall. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.3 Mounting The Appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.4 Central Heating & Domestic Hot Water Service Connections . . . . . . . . . . . 18

4.5 Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.6 Condensate Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.7 Pressure Relief Valve Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.8 Air / Flue Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.9 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.10 Optional Cylinder/Tank Temperature Sensor

(SBX Appliances Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.1 Filling the Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.2 Commissioning the Appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.3 DHW Flow Rate (Cbx Appliances Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.4 Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.5 Location Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.6 Frost Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.7 Overheat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.8 Other Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.9 Users Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.10 Appliance Log Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.11 Gas Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6 Routine Servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1 Combustion Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2 Gas Control Valve, Fan & Burner Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.3 Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.4 Ignition & Detection Electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.5 Combustion Chamber & Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.6 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.7 Domestic Cold Water Inlet Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.8 Sealed Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.9 Re-assembly & Re-commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.10 Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7 Internal Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.1 Functional Flow Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

8 Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.2 Diagnostic LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.3 Faulting Finding Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.4 Domestic Hot Water Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.5 Central Heating Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

9 Replacement Of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.1 Ignition and Detection Electrodes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.2 Igniter Unit and Ignition Leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.3 Gas Control Valve including Air Inlet Cowl. . . . . . . . . . . . . . . . . . . . . . . . . . . 33

9.4 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9.5 Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

9.6 Combustion Chamber Front Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

9.7 Combustion Chamber Rear Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

9.8 Heat Exchanger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

9.9 Flue Hood. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9.10 Pump (Head Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

9.11 Diverter Valve Motorised Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

9.12 Hydroblock Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

9.13 Expansion Vessel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

9.14 Pressure Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

9.15 Water Temperature Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

9.16 Flue Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

9.17 Plate Heat Exchanger and Filter

(CBX Appliances Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.18 Condensate Drain System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.19 Pressure Gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.20 Auto Air Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9.21 Control PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.22 Time Clock (CBX Appliances Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.23 DHW Flow Turbine, Flow Regulator and Filter

(CBX Appliances Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

9.24 Draining The Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

10 Short Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

1

The Halstead, Eden CBX, and Eden SBX range are, high efficiency
condensing, fully automatic, wall mounted gas appliances suitable for
either room sealed or opened flued applications, for use with natural gas
(G20), and LPG (G31). The Eden CBX combination appliances provide the
user with both central heating (CH) and domestic hot water (DHW) on
demand, with DHW pre-heat feature. The Eden SBX models are suitable
for a sealed central heating system, with the facility to heat and control
a hot water cylinder directly.

The appliances feature an attractive white stove enamelled casing, with
inset control panels. The flue systems are in white stove enamel to give
a clean attractive appearance to the installation.

A standard horizontal concentric air/flue duct terminal is available,
(maximum duct length of 755 mm (29in)), suitable for room sealed
applications. The duct assembly is connected to the appliance via a turret,
which can be orientated to provide different horizontal duct directions.
Extension ducts may be fitted in accordance with and up to the maximum
dimensions stated in these instructions.

A vertical concentric outlet kit is also available for installations where an
outside wall is not accessible or where it is desired to fit the duct 'through
the roof'. Installation using the horizontal duct is described in the main
text of these instructions and additional information is provided in the
vertical outlet kit for the vertical installation option. (Note: If the vertical
outlet kit is to be used, access to the roof is necessary).

Other flue kits are available for open flued (B23), split flued (C53), and
special (C13) applications, contact Halstead Boilers Ltd Service Help
Line: 0844 371 1111, for further details,

ONLY HALSTEAD APPROVED FLUE KITS OR EXTENSIONS MAY BE USED
WITH THESE APPLIANCES.

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IMPORTANT INFORMATION

1.1

IT IS A STATUTORY REQUIREMENT THAT ALL GAS APPLIANCES ARE
INSTALLED BY COMPETENT PERSONS, (i.e. CORGI REGISTERED
INSTALLERS) IN ACCORDANCE WITH THE GAS SAFETY (INSTALLATION
AND USE) REGULATIONS (CURRENT EDITION). FAILURE TO COMPLY
WITH THESE REGULATIONS MAY LEAD TO PROSECUTION.

These appliances have been tested and certified in order to satisfy the
necessary European Directives and comply with the latest Building
Regulations, including the efficiency requirements of the SEDBUK
scheme.

Gas Appliance Directive 90/396/EEC
Efficiency of Hot Water Boilers Directive 92/42/EEC
Low Voltage Directive 93/68/EEC
Electromagnetic Compatibility Directive 92/31/EEC
No modifications to these appliances should be made unless they are

fully approved by the manufacturer.
Appliance installation must be carried out by a competent person and

must be in accordance with the current legislation in force at the time of
installation, in the country of destination.

The manufacturer's instructions must not be taken as overriding any
statutory requirements.

GAS LEAKS. DO NOT OPERATE ANY ELECTRICAL
SWITCHES, OR USE A NAKED FLAME. TURN OFF THE

!

Control of Substances Hazardous to Health

Under Section 6 of the Health and Safety at Work Act 1974, it is required
to provide information on substances hazardous to health.

The adhesives and sealants used in this appliance are cured and give no
known hazard in this state.

Insulation Pads - These can cause irritation to skin, eyes and the
respiratory tract. If you have a history of skin complaints you may be
susceptible to irritation. High dust levels are usual only if the material
is broken. Normal handling should not cause discomfort, but follow
normal good hygiene and wash your hands before eating, drinking or
going to the lavatory. If you do suffer irritation to the eyes or severe
irritation to the skin seek medical attention.

Gas and Electricity Consumer Council (Energywatch)

Energywatch is an independent organisation, which protects the
interests of gas users. If you need advice concerning energy issues, they
may be contacted on their consumer help line number: 08459 060708, or
via their web site;

http://www.energywatch.org.uk.

GAS SUPPLY. VENTILATE THE AREA BY OPENING
DOORS AND WINDOWS. CALL OUT YOUR LOCAL GAS
SUPPLIER.

GENERAL DESCRIPTION

1.2

The appliances incorporate a microprocessor based, fully modulating
air/gas ratio control system with direct burner ignition, which provides
a modulated heat output to either central heating (CH) or domestic hot
water (DHW) demands, and with internal frost protection provided as
standard across the range. The heat exchanger is constructed from
stainless steel.

A combined circulating pump, diverter valve and automatic air vent
assembly, pressure gauge, safety valve and system expansion vessel
are included. Isolation valves are fitted to the service connections. The
CBX appliances have a DHW flow detection device, which gives priority
to DHW demand and proportions the required heating load to the DHW
flow rate, an electro-mechanical 24 hour time clock is also fitted as
standard to the CBX appliances.

The appliances may be used with any certified mains voltage room
thermostat, (or programmer/ room thermostat SBX appliances), and
can operate without the need for an automatic bypass valve, however if
thermostatic radiator valves are installed it is recommended that one
radiator is fitted with lockshield valves, (normally in the bathroom), to
allow the pump overrun facility to operate correctly. A separate CH
expansion vessel is not required if the total CH system content is less
than 84 litres, but one is required for systems with volumes greater than
84 litres; refer to section 3.7. A separate DHW expansion vessel is not
required for the CBX appliances.

1

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2

2.1

These appliances are certified to comply with the requirements of EN
483, EN 677, and EN 625 for use in GB and IE (Great Britain and Ireland)
using the following gas categories:

Eden CBX 38, Eden CBX 32, Eden CBX 24, Eden SBX 30:

II

(G20 with a governed gas supply at 20 mbar (8 in.wg) inlet

2H3P

pressure).

2.2

Appliance CBX38 CBX32 CBX24 SBX30 CBX38 CBX32 CBX24 SBX30

Mode Rate
Central Heating Output Max

(non-condensing)
(80 - 60 °C) Min

Central Heating Output
(condensing) (50 - 30 °C) (Btu/h) (109500) (87700) (65900) (109500) (109500) (87700) (65900) (109500)

Central Heating Input (Btu/h) (104440) (83600) (62800) (103700) (104440) (83600) (62800) (103700)
Max Rate

Central Heating Input (Btu/h) (31400) (24900) (18800) (26000) (31400) (24900) (18800) (26000)
Min Rate

Domestic Hot Water Output

Domestic Hot Water Input (Btu/h) (132300) (111600) (83600) (132300) (111600) (83600)
Max rate

Domestic Hot Water Input (Btu/h) (31400) (24900) (18800) (31400) (24900) (18800)
Min rate

TECHNICAL SPECIFICATIONS

GAS CATEGORIES

PERFORMANCE DATA

kW 30.0 24.0 18.0 30.0 30.0 24.0 18.0 30.0

(Btu/h) (102400) (81900) (61400) (102400) (102400) (81900) (61400) (102400)

kW 9.0 7.9 5.9 8.2 9.0 7.9 5.9 8.2

(Btu/h) (30700) (27000) (20100) (28000) (30700) (27000) (20100) (28000)

kW 32.1 25.7 19.3 32.1 32.1 25.7 19.3 32.1

Max

kW 30.6 24.5 18.4 30.4 30.6 24.5 18.4 30.4

Net

kW 34.0 27.2 20.4 33.8 33.2 26.6 20.0 33.0

Gross

(Btu/h) (116000) (92800) (69600) (115300) (113400) (91000) (68300) (112700)

kW 9.2 7.3 5.5 7.6 9.2 7.3 5.5 7.6

Net

kW 10.2 8.2 6.1 8.4 10.0 7.9 6.0 8.3

Gross

(Btu/h) (34800) (28000) (20800) (28600) (34000) (27000) (20500) (28300)

kW 38.0 32.0 24.0 38.0 32.0 24.0

Max

(Btu/h) (129600) (109200) (81900) (129600) (109200) (81900)

kW 9.0 7.9 5.9 9.0 7.9 5.9

Min

(Btu/h) (30700) (27000) (20100) (30700) (27000) (20100)

kW 38.8 32.7 24.5 38.8 32.7 24.5

Net

kW 43.1 36.2 27.2 42.1 35.5 26.6

Gross

(Btu/h) (146900) (123500) (92800) (143600) (121000) (90800)

kW 9.2 7.3 5.5 9.2 7.3 5.5

Net

kW 10.2 8.2 6.1 10.0 7.9 6.0

Gross

(Btu/h) (34800) (28000) (20800) (34000) (27000) (20500)

Eden CBX 38 Propane, Eden CBX 32 Propane,
Eden CBX 24 Propane, Eden SBX 30 Propane:

(G31 (Propane) with a regulated gas supply at 37 mbar (14.9 in.wg)

II

2H3P

inlet pressure).
The appliance classification (as defined in EN 483) may be any of the

following depending on the chosen flue option: C

Propane Propane Propane Propane

, C33, C53, or B

13

23

Central Heating Gas Rate
(after 10 min operation - hot)

Domestic Hot Water Gas Rate
(after 10 min operation - hot)

Seasonal Efficiency % 90.2 90.8 90.2 90.4 92.3 92.2 92.2 92.4
Seasonal Efficiency (SEDBUK) Band “A”
Nox Classification Class “5”

2

m3/h 3.24 2.59 1.95 3.22

Max (ft3/h) (114.4) (91.5) (68.9) (113.7)

kg/h 2.2 1.9 1.43 2.36

m3/h 41.0 3.46 2.59

Max (ft3/h) (144.8) (122.2) (91.5)

kg/h 2.8 2.55 1.9

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1

5

9

2

6

10

3

7

11

4

8

12

42

13

17

21

14

18

22

15

19

23

16

20

24

751030 MANUAL (NEW) 21/9/10 08:39 Page 9

Appliance CBX38 CBX32 CBX24 SBX30 CBX38 CBX32 CBX24 SBX30

Propane Propane Propane Propane

Design Domestic Hot Water l/min 15.6 13.1 9.8 15.6 13.1 9.8
Performance raised 35 °C (gpm) (3.4) (2.8) (2.2) (3.4) (2.8) (2.2)

DHW Specific Rate (D) EN 625 l/min 18.1 15.3 11.5 18.1 15.3 11.5
Min Mains Water Inlet Pressure Bar 1.0 1.0

for Max Heat Output (psi) (14.5) (14.5)
Min Mains Water Inlet Pressure Bar 0.1 0.1

for Operation (psi) (1.5) (1.5)
Max Mains Water Inlet Pressure

Min Domestic Hot Water Flow l/min 2.5 2.5
Rate for Operation (gpm) (0.5) (0.5)

Min Central Heating System Pressure
Max Central Heating System Pressure
Max Domestic Hot Water Temp. °C 60 60
Min Domestic Hot Water Temp. °C 40 40
Max Central Heating Flow Temp. °C 80
Min Central Heating Flow Temp. °C 30

Bar 10 10

(psi) (145) (145)

Bar 0.7
Bar 2.5

GENERAL SPECIFICATIONS

2.3

Natural Gas and Propane versions

Appliance CBX38 CBX32 CBX24 SBX30
Total weight (full) kg 55.4 54.9 51.7 55.2
Total weight (empty) kg 52.8 52.8 49.9 52.8
Max lift weight kg 42.2 42.0 39.0 41.0
Total water capacity l 2.4 2.1 1.8 2.4
Integral expansion vessel capacity l8
Maximum heating system water content using

fitted expansion vessel, @ 0.75 bar
Electrical supply 230V 50Hz Fuse at 3A
Internal fuse T4H 4A 250V
Maximum power consumption W 148
IP Rating IP33
Flue gas temperature Nat Gas 80/60 (Propane) °C 80 79 (77) 74 (72) 73 (76)
Flue gas temperature Nat Gas 50/30 62 41 43 41
CO2value max rate (Nat Gas) Front door fitted % 9.2-9.6 9.0-9.4 8.5-8.9 9.0-9.4
CO2value min rate (Nat Gas) ref only Front door fitted % 8.2-8.6 8.2-8.6 8.2-8.6 8.7-9.1
CO value max rate (Nat Gas) Front door fitted P.P.M. 5-150
CO2value max rate (Propane) Front door fitted % 10.3-11.0
CO2value min rate (Propane) ref only Front door fitted % 9.4-10.0 9.7-10.3
CO value max rate (Propane) Front door fitted P.P.M. 100-240
Flue products mass flow rate (Nat Gas) g/s 17.4 14.7 11.0 13.7
Flue products mass flow rate (Propane) g/s 17.4 14.7 11.0 13.7
Gas Valve Offset @ min rate Pa -3.0

l 84

3

751030 MANUAL (NEW) 21/9/10 08:39 Page 10

Connections

Gas 15 mm compression 22 mm compression
CH flow 22 mm compression
CH return 22 mm compression
DHW inlet CBX appliance only
DHW outlet CBX appliance only 15 mm compression
DHW return SBX appliance only 22 mm compression
Pressure relief valve outlet 15 mm tail
Condensate Drain 21.5 - 22 mm plastic overflow pipe

OVERALL DIMENSIONS AND MINIMUM CLEARANCES

2.4

CBX32 CBX24 SBX30 CBX38

15 mm compression

1

366mm

150mm

228mm

760mm

100mm

Ø

200mm

97mm

5mm

914mm

SEE NOTE

5mm

NOTE:

10mm for
normal
operation.

450mm for
installation
and
servicing.

455mm

CONCENTRIC AIR / FLUE DUCT SPECIFICATIONS

2.5

The EDEN 'x-type' range can be installed to a number of different
concentric flue systems. The different flue applications as shown in Figure
2 are available as kits usually comprising the connecting parts to the
appliance and end terminal. Flue extension ducts and extension elbows
are available as accessories.

4

200mm

751030 MANUAL (NEW) 21/9/10 08:39 Page 11

10

Refer to Figure 54

Key G C Part No. Description No off Makers Pt No.
1 Ignition Electrode 1 988526
2 Detection Electrode 1 988527
3 Spark generator Unit incl. spark leads 1 500665
4a Gas Control Valve - NG/LPG (CBX24/32 SBX30) 1 988315
4b Gas Control Valve - NG/LPG (CBX38) 1 988640
5 Fan Assembly 1 601015
6a Burner (CBX32) 1 700601
6b Burner (CBX24) 1 700600
6c Burner (CBX38/SBX30) 1 700602
7a Heat Exchanger (CBX32) 1 451031
7b Heat Exchanger (CBX24) 1 451032
7c Heat Exchanger (CBX38/SBX30) 1 451030
8 Pump Head (6 metre) 1 500672
9 Diverter Valve Motorised Head 1 500673
10 Hydroblock Assembly 1 500650
11 Expansion Vessel 1 451020
12 Pressure Relief Valve 1 300734
13 Water Temperature Sensor 2 500661
14 Flue Sensor 1 500660
15a Plate Heat Exchanger (CBX24/32) 1 451015
15b Plate Heat Exchanger (CBX38) 1 451018
16 Plate Heat Exchanger Filter 1 500498
17 Pressure Gauge 1 450961
18 Auto Air Vent 1 500674
19 Control PCB incl cover 1 988488
20 Time Clock 1 600520
21 DHW Flow Turbine 1 300733
22a DHW Flow Regulator (CBX32) 1 300715
22b DHW Flow Regulator (CBX24) 1 300717
22c DHW Flow Regulator (CBX 38) 1 300719
23 DHW Filter 1 500497
24 Manual Bleed valve 1 300730

SHORT PARTS LIST

Heat Exchanger o-ring kit 988489
Hydroblock o-ring kit 988490

41

751030 MANUAL (NEW) 21/9/10 08:39 Page 12

9.21

Refer to Figures 19, 24 & 52
a) Ensure supply voltage is isolated.
b) Lower the controls front panel and lower the control fascia panel.
c) Unplug the electrical leads from the PCB. Refer to section 7.
d) Unplug the BCC if fitted.
e) Remove the PCB plastic cover.
f) Unclip the PCB and withdraw.
g) Carefully remove the three control knobs, noting their position and

h) Fit the new PCB and plug in the BCC if previously used.
i) Re-assemble in reverse order, ensuring control knobs are free to

j) Turn ON the electrical supply and set the ON/OFF switch to ON, if the

a) Press the Reset button. The Reset LED and LED 1 should flash once.
b) Wait approximately 5 seconds, while the control is re-programmed

9.22

a) Ensure supply voltage is isolated.
b) Lower the controls front panel and lower the control fascia panel.
c) Unplug the electrical leads from the PCB. Refer to section 7.
d) Unplug the four electrical leads from the back of the clock.
e) Remove the four retaining screws and withdraw the clock from the

f) Fit the new clock and re-assemble in reverse order.

9.23

CONTROL PCB

fit onto new PCB.

move and reset button operates.

Reset LED, (Refer to section 8.3), shows steady red proceed as
follows:

and then press the Reset button, to initialise the control.

TIME CLOCK (CBX APPLIANCES ONLY)

control panel.

DHW FLOW TURBINE, DHW FLOW
REGULATOR AND DHW FILTER
(CBX APPLIANCES ONLY)

Refer to Figure 28
a) Ensure supply voltage is isolated.
b) Remove the electrical lead to the DHW flow turbine.
c) Close the DHW inlet isolating cock, open a DHW tap at the lowest

point in the system and allow the pressure to dissipate. Close this
tap again.

d) Undo the nut connecting the DHW flow turbine to the DHW inlet

isolating cock.

e) Undo the nut connecting the DHW flow turbine to the water feed

pipe, and remove the DHW flow turbine, (containing the DHW Flow
Regulator).

f) The DHW filter is located inside the flow cock. To remove it, first

remove the top hat washer and then prise the filter out with a
pointed tool.

g) The assembly can now be flushed clean using water, and parts

replaced as necessary.

h) Re-assemble in reverse order, using a new fibre washer; ensure

that all joints and seals are correctly re-fitted.

i) Open the DHW inlet isolating cock and vent air from the system by

40

opening each hot water tap in the house in turn.

PCB HOUSING

52

NG/Propane
chip card

9.24

There may be some slight water spillage; so electrical components
should be protected.

Refer to Figures 43 & 53
a) Before draining, give the appliance a brief CH demand, to ensure

b) Ensure supply voltage is isolated.
c) If not draining the entire CH system, close the CH flow, CH return

d) Close the DHW return water-isolating cock, (where fitted).
e) Drain down the system from the external drain point, and drain the

f) Where the DHW circuit is to be worked on, close the DHW inlet

Note: the pressure relief valve should not be used to drain the system.

53

DRAINING THE APPLIANCE

the diverter valve is in the CH position.

water isolating cocks.

appliance using the drain tap on the CH flow water isolating cock, in
conjunction with the manual air vent located on the LHS of the heat
exchanger; refer to Figures 43 and 53.

isolating cock, open a DHW tap at the lowest point in the system and
allow the pressure to dissipate. Close this tap again.

DRAIN POINT

DRAIN

POINT

Electrical
Connectors

Securing
Screws

Vertical flue kit - Part no. 956081

with flat roof flashing plate

Vertical flue kit - Part no. 956081

Flue system application

Vertical flue kit - Part no. 956081

Split pipe vertical flue outlet kit

- Part no. 956080

with flat roof flashing plate

Raised external flue outlet kit

- Part no. 956084

Chimney flue liner kit

- Part no. 956082

External vertical flue kit

- Part no. 956085

Telescopic horizontal flue kit

- Part no. 956120

751030 MANUAL (NEW) 21/9/10 08:39 Page 13

FLUE OPTIONS

2

The following systems are available for the EDEN ‘x-type’ range.
For full fitting instructions refer to the leaflet supplied with the flue kit.

2.5.1

3a

Traditional concentric flue system, Figure 3a, with a maximum length of
10m*. The flanged flue elbow is designed with 3° slope towards the
appliance so that the condensate can easily drain off. It has to be considered
that for every metre horizontal flue length the terminal exit centreline is
approx. 45 mm higher than the elbow’s centreline. The standard telescopic
terminal is 615mm max length and 430mm min length, but can be cut to a
minimum flue length of 250mm, which is suitable for single, 100mm (4"),
brick walls.

* Note: Flues which exceed 7mtrs in length will be subject to a small percentage decrease in heat input (below the standard tolerance) as shown
in graph ‘A’ on the following page.

KIT A + TELESCOPIC HORIZONTAL WALL
TERMINAL (C13) - PART NO. 956120

2.5.2

KIT B VERTICAL CONCENTRIC FLUE
TERMINAL (C33) - HBL PART 956081

3b

Standard concentric (ø100/60) vertical flue application, Figures 3b, 3c,
through roof attics with a maximum length of 12m*. The kit comprises
of the roof terminal, vertical adaptor with sampling point and bracket.
The maximum length is measured from the top of the appliance casing
to the underside of the air cowl.

5

751030 MANUAL (NEW) 21/9/10 08:41 Page 14

GRAPH A

102.0

101.0

100.0

99.0

98.0

97.0

96.0

Heat input (%)

95.0

94.0

93.0

92.0

Horizontal flues (

Reduction in heat input as flue length increases

0123456789 1011

Flue Length (m)

C33) up to 10m in length, or equivalent, may be used,
however a reduction in the heat input will occur. The graph shows
details.

3c

a

Roof
terminal with
rain cover
and pitched
roof flashing
kit.

b

3d

2.5.4

3e

KIT D EXTERNAL VERTICAL FLUE - (C33)
PART NO. 956085

Fig 3(c) Offset vertical flue.

‘a’ measured from boiler flue outlet centre line to the centre line of
the extension elbow.
‘b’ measured from the top of the boiler to the underside of the air cowl.
Maximum allowable length of a + b = 8900mm

2.5.3

KIT C: HORIZONTAL ANTI-PLUME
FLUE KIT (C13) - PART NO. 956084

If the standard horizontal terminal is likely to cause nuisance to a
neighbour or buildings, because of excess pluming, then this particular
flue kit raises the flue gas outlet point to a higher elevation with the
minimum amount of changes. The flue gas duct is teed-off from the
concentric part and covered by an 80mm outer tube to protect the flue
duct from freezing. The air in-take remains at the lower level (see
Figure 3d).

If choosing this option then the external flue duct length should be
taken into account when calculating equivalent flue length.

For installation details refer to the flue kit instructions.

Dimensions from vertical terminals to opening
windows should be in line with Figure 5.

6

Suitable for installations if the appliance can’t be repositioned
and where other horizontal flue options may cause some nuisance to
neighbours or buildings. The flue kit contains some additional 45°
elbows and extension ducts as well as a special wall bracket to pass the
guttering (see Figure 3e). The concentric flue will be routed vertically
alongside the outside wall to above the roofline. Special seals are required
to prevent rainwater penetrating the pipe joints.

For installation details refer to the flue kit instructions.

751030 MANUAL (NEW) 21/9/10 08:41 Page 15

FLUE SENSOR

50

FLUE
SENSOR

9.17

PLATE HEAT EXCHANGER AND
FILTER (CBX APPLIANCES ONLY)

Refer to Figure 51
a) Ensure supply voltage is isolated.
b) Drain down the appliance; refer to section 9.24.
c) Close the DHW inlet isolating cock, open a DHW tap at the lowest

point in the system and allow the pressure to dissipate. Close this
tap again.

d) Undo the nut connecting the flow pipe from the main heat exchanger

to the plate heat exchanger, and rotate in an anticlockwise direction
to give access to the filter.

e) Lift out the filter and clean under a tap.
g) Refit the filter, or replace as necessary, and re-assemble in reverse

order; ensure that all joints and seals are correctly re-fitted.

h) If it is suspected that the plate heat exchanger is blocked or is

leaking then proceed as follows:

i) Undo the nut connecting the pipe from the hydroblock to the plate

heat exchanger, and rotate out of the way.

j) Undo the nut connecting the plate heat exchanger to the CH flow

water isolating cock pipe.

k) Undo the nut connecting the plate heat exchanger to the DHW outlet

pipe.

l) Undo the nut connecting the plate heat exchanger to the DHW water

isolating cock pipe.

m) Lift up the plate heat exchanger and remove.
n) Fit the replacement plate heat exchanger, using new case seals as

necessary, ensuring the filter is fitted.

o) Re-assemble in reverse order; ensure that all joints and seals are

correctly re-fitted.

p) Open the isolating cocks and vent air from the system using the

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

PLATE HEAT EXCHANGER

51

PRIMARY
FLOW PIPE

FIBRE
WASHER

FILTER

PLATE HEAT
EXCHANGER

9.18

Refer to Figure 27
a) Ensure supply voltage is isolated.
b) Open the drain sump cap, while holding a receptacle beneath to

c) Disconnect the condensate drainpipe from the appliance.
d) Undo the two locknuts holding the system in place.
e) Unclip the hose from the support bracket.
f) Detach the condensate drainpipe sump adaptor, by gently pulling

g) Remove the condensate drain system, clean or replace as necessary.
h) Re-assemble in reverse order; ensure that all joints and seals are

9.19

Refer to Figure 24
a) Ensure supply voltage is isolated.
b) Drain down the appliance; refer to section 9.24.
c) Disconnect the pressure gauge capillary from the pressure relief

d) Disengage the pressure gauge from the fascia panel, and remove the

e) Fit the new pressure gauge and re-assemble in reverse order.
f) Open the isolating cocks and vent air from the system using the

9.20

Refer to Figure 47
a) Ensure supply voltage is isolated.
b) Drain down the appliance; refer to section 9.24.
c) Disconnect the vent tube from the auto air vent and check that it is

d) Unscrew the auto air vent, and fit replacement.
e) Re-assemble in reverse order; ensure that all joints and seals are

f) Open the isolating cocks and vent air from the system using the

CONDENSATE DRAIN SYSTEM

capture any condensate.

down.

correctly re-fitted.

PRESSURE GAUGE

valve.

gauge.

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

AUTO AIR VENT

free from blockage.

correctly re-fitted.

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

39

751030 MANUAL (NEW) 21/9/10 08:41 Page 16

9.13

Refer to Figure 48
a) Ensure supply voltage is isolated.
b) Drain down the appliance; refer to section 9.24.
c) Remove the spire clip on the case in front of the expansion vessel.
d) Undo the nut connecting the flexible hose to the expansion vessel

e) Slide the expansion vessel forward and remove.
f) Slide the replacement expansion vessel in place.
g) Re-assemble in reverse order; ensure that all joints and seals are

h) Open the isolating cocks and vent air from the system using the

48

EXPANSION VESSEL

and remove hose.

correctly re-fitted.

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

EXPANSION VESSEL

TOP MOUNTING RAIL

EXPANSION VESSEL

9.15

Refer to Figure 49
a) Ensure supply voltage is isolated.
b) Disconnect the electrical lead from the sensor to be changed.
c) Unclip the sensor from the pipe and remove.
d) Clip the replacement sensor onto the pipe and position as shown in

e) Reconnect the electrical lead.

49

WATER TEMPERATURE SENSORS

Figure 49.

49a FLOW SENSOR

75mm

± 10mm

REMOVE SPIRE CLIP
FROM THIS POSITION

CONNECTION POINT
FOR FLEXIBLE HOSE

BOTTOM MOUNTING RAIL

9.14

Refer to Figures 18 & 24
a) Ensure supply voltage is isolated.
b) Drain down the appliance; refer to section 9.24.
c) Undo the nut securing the discharge tail pipe to the pressure relief

d) Undo the nut securing the pressure relief valve to the CH flow pipe

e) Fit the replacement pressure relief valve, using new fibre washers.
f) Re-assemble in reverse order; ensure that all joints and seals are

g) Open the isolating cocks and vent air from the system using the

Note: the pressure relief valve should not be used to drain the system.

38

PRESSURE RELIEF VALVE

valve and remove. Undo the nut securing the pressure gauge
capillary, and remove.

and remove the pressure relief valve.

correctly re-fitted.

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

49b RETURN SENSOR

50mm

± 10mm

9.16

Refer to Figure 50
a) Ensure supply voltage is isolated.
b) Disconnect the electrical lead from the flue sensor.
c) Unscrew the flue sensor and remove from the flue hood.
d) Fit the replacement flue sensor and reconnect the electrical lead

FLUE SENSOR

(blue plug).

751030 MANUAL (NEW) 21/9/10 08:41 Page 17

KIT E CHIMNEY FLUE LINER KIT

2.6

(B23) - PART NO. 956082

This kit is suitable for open flue application in accordance with BS5440
where a room sealed flue installation is impractical. The kit comprises of
a flue adaptor from the appliance to the chimney, a flexible plastic flue
liner with connection parts and chimney terminal (see Figure 3f). Where
an open flue system is used, then an air vent must be provided in the
same room or internal space as the flue duct air inlet, see section 3.4.

For installation details refer to the flue kit instructions.
Maximum flue resistive length = 30m.

3f

It has to be noted that the flue duct is under pressure when the appliance
is in operation and the duct can leak poisonous carbon monoxide if the
duct components are not correctly assembled. It is not recommended
to route the flue duct through living space areas, i.e. bed rooms, living
rooms etc.

For installation details refer to the instructions provided with the twin
flued kit.

For C53 flue systems the terminal for the supply of combustion air and
for the evacuation of combustion products shall not be installed on
opposite walls of the building.

Maximum flue resistance permitted for a twin flued system
= 52 Pa
Minimum flue resistance permitted for a twin flued system
= 23.5 Pa

Flue Component Flue Resistance (Pa) Part Number

Twin Flue Adaptor (required) 9.5 ­Air Inlet Terminal (required) 3 ­Chimney Terminal (required) 0.5 ­80 mm dia straight duct 1 metre 1 956101
80 mm dia straight duct 2 metre 2 956102
90° Elbow (80/80) 8 956100

45° Elbow (80/80) 4 956099

3g

A flue system can be built up from the components
detailed in the table, but the total flue resistance must
not exceed the maximum stated.

KIT F: TWIN FLUE SYSTEM (C53)

2.7

PART NO. 956080

This flue system kit is designed for installations where the air intake
position is different than the flue duct exit point. The kit comprises of a
twin adaptor from which the air intake is taken from the adjacent outside
wall (see example Figure 3g) and the flue duct is routed vertically
through the roof.

A flue system can be built up from the components
detailed in the table, but the total flue resistance
must not exceed the maximum stated.

7

751030 MANUAL (NEW) 21/9/10 08:41 Page 18

FLUE LENGTHS

Length supplied in standard kit - horizontal 815mm
Max horizontal length (from boiler to chimney - 60/100mm) 2000mm
Min horizontal length (from boiler to chimney - 60/100mm) 100mm
Max vertical length (from boiler to chimney - 60/100mm) 2000mm
Min vertical length (from boiler to chimney - 60/100mm) 200mm
Length supplied in standard kit - vertical (available in 10m, 20m and 30m length) N/A

FLEXITUBE MUST BE PURCHASED AS AN ACCESSORY TO COMPLETE THE KIT

Flexi tube min length 5m
Flexi tube max length 30m

ACCESSORIES

Description Part No. Resistive Length

HORIZONTAL - 60/100 Accessories

Flue extension duct - 500mm 956092 450mm
Flue extension duct - 1000mm (Incl. 1 x support bracket) 956093 950mm
93° extension elbow 956091 1550mm
45° extension elbow (pair) 956090 775mm
Air inlet duct - included in kit N/A N/A
Straight adapter (60/80) - included in kit N/A N/A

91.5° adapter elbow (80/80) - included in kit N/A N/A
Support bracket - 100mm 840517 N/A
93° flanged elbow - included in kit 956082 N/A
Vertical turret socket 956087 N/A

VERTICAL - Accessories

Flexi tube - 10m 956110 10m
Flexi tube - 20m 956111 20m
Flexi tube - 30m 956112 30m
Straight duct (80) - included in kit N/A N/A
Chimney terminal - included in kit N/A N/A

(See below)

NOTE: RESISTIVE LENGTH INFORMATION ONLY REQUIRED FOR COAXIAL FLUE PARTS. THE CORRUGATED (FLEXI TUBE)
FLUE PARTS ARE FIXED AND ALL PARTS ARE REQUIRED FOR EVERY APPLICATION.

8

751030 MANUAL (NEW) 21/9/10 08:41 Page 19

9.11

DIVERTER VALVE MOTORISED HEAD

Refer to Figure 46
a) Ensure supply voltage is isolated.
b) Disconnect the electrical lead to the diverter valve motorised head.
c) Unscrew the locating screw; refer to Figure 46.
d) Unclip the diverter valve motorised head and slide it down to

disengage it from the hydroblock body.

e) Fit the replacement diverter valve motorised head.
f) Re-assemble in reverse order; ensure that all joints and seals are

correctly re-fitted.

DIVERTER VALVE MOTORISED HEAD

46

PUSH
CLIP

LOCATING SCREW

ELECTRICAL CONNECTOR

9.12

HYDROBLOCK ASSEMBLY

Refer to Figure 47
a) Ensure supply voltage is isolated.
b) Disconnect the electrical leads to the pump head and diverter valve

motorised head.

c) Drain down the appliance; refer to section 9.24.
d) Remove the flow and return pipes from the heat exchanger; refer

to section 9.8.

e) Remove the clip holding the hydroblock adaptor fitting in place, and

remove fitting.

f) Remove the two clips holding the return pipes in place.
g) Undo the nut connecting the CH return pipe to the CH return

isolating cock, and disengage the CH return pipe from the
hydroblock.

h) On CBX appliances, undo the nut connecting the DHW return pipe

to the plate heat exchanger and disengage the DHW return pipe
from the hydroblock.

i) On SBX appliances, undo the nut connecting the secondary return

pipe to the secondary return isolating cock and disengage the
secondary return pipe from the hydroblock.

j) Remove the clip holding the flexible hose in place, and remove hose.
k) Unscrew the three screws holding the hydroblock onto the mounting

studs, and remove the hydroblock.

l) Align the replacement hydroblock against the mounting studs and

secure using the three screws.

m) Re-assemble in reverse order; ensure that all joints and seals are

correctly re-fitted.

n) Open the isolating cocks and vent air from the system using the

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

Note: It is likely that there will still be some water spillage when the
Hydroblock is removed.

HYDROBLOCK ASSEMBLY

47

PUMP ELECTRICS COVER

PUMP ELECTRICAL

CH RETURN PIPE

PUMP AIR BLEED SCREW

PUMP HEAD

CONNECTOR

SMALL OUTLET PLUG

LARGE OUTLET PLUG

LOCATING SCREW

ELECTRICAL CONNECTOR

AUTO AIR VENT

DIVERTER

DIVERTER MOTOR

PRIMARY HEAT EXCHANGER
RETURN PIPE

FIBRE WASHER

PIPEWORK ADAPTOR

EXPANSION VESSEL HOSE

LARGE PIPE CLIP

SMALL PIPE CLIP

HYDROBLOCK MOUNTING POINT

PIPE ‘O’ RING

PRIMARY RETURN PIPE

37

751030 MANUAL (NEW) 21/9/10 08:41 Page 20

j) Disconnect the condensate drainpipe from the condensate drainpipe

sump adaptor; refer to section 9.18.

k) Unscrew the three nuts holding the heat exchanger to the back

panel; refer to Figure 43.

l) Remove the heat exchanger.
m) Disconnect the condensate drainpipe sump adaptor from the heat

exchanger.

n) Remove the flue hood from the heat exchanger, two screws, and fit

the flue hood onto the new heat exchanger, Check integrity of the
flue hood seals and replace as necessary. Remove the manual air
vent and vent tube from the heat exchanger and fit onto to new heat
exchanger; refer to Figure 43.

o) Fit the condensate drainpipe sump adaptor to the heat exchanger

and flue hood.

p) Re-assemble in reverse order; check integrity of the flow and return

pipe 'O' rings and fibre washers and replace as necessary. Ensure
that all joints and seals are correctly re-fitted.

q) Open the isolating cocks and vent air from the system using the

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

Note: It is likely that the heat exchanger will still contain water.

HEAT EXCHANGER

43

MANUAL AIR VENT FLUE SENSOR

RETAINING
CLIP

FIXING

POINTS

FLUE HOOD

9.9

Refer to Figures 44
a) Ensure supply voltage is isolated, and that the gas supply is isolated.
b) Remove the gas control valve, fan & burner assembly; refer to

section 6.2.

c) Remove the heat exchanger: refer to section 9.8.
d) Disconnect the condensate drainpipe sump adaptor from the heat

exchanger; refer to section 9.18.

e) Remove the existing flue hood from the heat exchanger, two screws,

and fit the replacement flue hood onto the heat exchanger; use new
flue hood seals; refer to Figure 44.

f) Fit the condensate drainpipe sump adaptor to the heat exchanger

and flue hood.

g) Unscrew the flue sensor from the existing flue hood and fit onto the

new flue hood; refer to section 9.16.

i) Open the isolating cocks and vent air from the system using the

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

FLUE HOOD

44

FLUE SEAL

FLUE HOOD
GASKET

FIXING POINTS

CONDENSATE DRAIN

9.10

Refer to Figure 45
a) Ensure supply voltage is isolated.
b) Disconnect the electrical lead to the pump head.
c) Drain down the appliance; refer to section 9.24.
d) Using a long Allen key unscrew the four screws holding the pump

e) Remove the pump head, and fit replacement pump head, using a

f) Re-assemble in reverse order; ensure that all joints and seals are

g) Open the isolating cocks and vent air from the system using the

Note: It is likely that there will still be some water spillage when the
head is removed.

45

PUMP (HEAD ONLY)

head; refer to Figure 45.

new 'O' ring seal.

correctly re-fitted.

manual air vent. Re-pressurise the system as necessary and check
for water leaks.

PUMP HEAD

ELECTRICAL
LEAD

SCREWS

4

h) Re-assemble in reverse order; check integrity of the flow and return

pipe 'O' rings and fibre washers and replace as necessary. Ensure

36

that all joints and seals are correctly re-fitted.

751030 MANUAL (NEW) 21/9/10 08:41 Page 21

ADDITIONAL CONCENTRIC FLUE KITS

2.8

The following additional concentric kits are available as optional extras.
Flue Extension Ducts - 1000 mm and 500 mm long, (each duct extends

the flue length by up to 950 mm and 450 mm respectively).
93° Extension Elbow - Allows an additional bend in the flue, and has an

'equivalent length' of 1550 mm. This elbow is mechanically different
from the flanged elbow supplied as standard with the appliance, but has
the same equivalent length.

45° Extension Elbow - Allows an additional bend in the flue and has an
'equivalent length' of 775 mm.

Vertical Turret Socket - For use with elevated horizontal flues and
vertical terminals.

Vertical Roof Terminal - For use where an external wall is not available,
or where it is desirable to route the ducts vertically.

For installation details refer to the instructions
provided with the individual flue kits.

These optional kits may be used with the standard flue kits to produce an
extensive range of flue options, providing that the following rules are
strictly obeyed.

a) The maximum/minimum permissible length of the room sealed flue

system are:

Horizontal flue terminal (all orientations) maximum 10000 mm (394 in)
Horizontal flue terminal (rear exit) minimum 250 mm (10 in)
Vertical flue terminal maximum 12000 mm (472 in)

1

Vertical flue terminal minimum 600 mm (23

/2 in)

2.8.1

PLUME DIVERTER
TERMINAL INSTALLATION

Plume Diverter Kit Part No: 956103

(For use with Standard horizontal telescopic flue kit - Part no 956120 ­only)

This kit is provided to assist in fitting a condensing boiler with reduced
clearances when fitted in good practice according to the Guide to
Condensing Boiler Installation published by DEFRA/HMSO.

This kit allows the boiler flue outlet to be directed to the left or to the
right only.

INSTALLATION INSTRUCTIONS

Under certain operating conditions condensing appliances have a
tendency to form a plume of water vapour at the terminal. Therefore
consideration should be given when fitting the Plume Diverter in terms
of plume dispersal onto adjacent surfaces and neighbouring properties.

a) Refer to section 2.5 for instructions on fitting the flue system.

Also see Figure 5 for all other clearances.

The resistance of the diverter is equivalent to 0.5
metre of flue length. Ensure this is used when
calculating the maximum allowable flue length.
(maximum horizontal flue length restricted to 4.5
metres when using the plume diverter).

3h

The 'equivalent' flue length must not exceed the
maximum values stated.

b) The standard terminal must always be fitted horizontally;

horizontal ducts must have a continuous fall towards the appliance
of 2.5°. This ensures condensate runs back into the appliance from
the flue system. The vertical terminal must always be used if a
vertical outlet is required.

c) The concentric flue system must use either a flanged elbow or a

vertical flue turret socket at the entry/exit to the appliance.

d) All joints must be correctly made and secured in accordance with

the installation instructions. When cutting ducts, avoid swarf,
uneven and sharp edges to maintain duct integrity.

Refer to Figures 2 and 3 to determine which option
kits are required before commencing the installation.
Instructions for installing the appliance with a
horizontal flue and straight extension ducts are
included in the main text of these instructions
(section 4.8).

9

751030 MANUAL (NEW) 21/9/10 08:41 Page 22

The diverter allows the terminal clearance to be reduced as follows (see
diagrams below):

Clearance H – From a surface facing the terminal - 600mm.
Clearance F – From internal or external clearances - 300mm.

b) Choose the direction required to deflect the flue products

(left or right only)

c) Push the diverter elbow onto the angled outlet of the flue terminal

in the desired rotational position and ensure the diverter is pushed
up to the shoulder to fully engage the rubber seal.

d) Fix the diverter to the flue terminal with the self drilling screw

provided. Do not use a power tool to fit screw.

3i

Note.
The Plume Diverter terminal must not under any
circumstances deflect flue products downwards.

10

APPLIANCE HYDRAULIC CIRCUITS

2.9

4a

Central Heating Mode (CBX)

CH

RETURN

DHW COLD

INLET

BURNER &

BURNER

FLANGE

PRIMARY

FLOW

FILLING

LOOP

FLOW

TURBINE

CH

FLOW

PRIMARY HEAT

EXCHANGER

CH FLOW

THERMISTOR

CH RETURN

THERMISTOR

AUTOMATIC AIR VENT

PUMP &

HYDROBLOCK

PLATE HEAT

EXCHANGER

PRESSURE

GAUGE

3 BAR

PRESURE

RELIEF VALVE

FLUE

PRODUCTS

DHW

HOT

OUTLET

EXPANSION

VESSEL

CONDENSATE
TRAP

CONDENSATE

OUTLET

751030 MANUAL (NEW) 21/9/10 08:41 Page 23

BURNER

9.5

Refer to Figures 38, 39 & 40
a) Ensure supply voltage is isolated, and that the gas supply is isolated.
b) Remove the gas control valve, fan & burner assembly; refer to

section 6.2.

c) Unscrew the three torx screws, (T-25), holding the manifold to the

combustion chamber front cover, and remove the manifold; refer to
Figure 38.

d) Remove the gasket, and withdraw the burner; refer to Figure 39
e) Fit replacement burner, taking care not to damage the insulation,

and ensure burner is correctly located by lining up the locating tab.

f) Fit new gasket; refer to Figure 40.
g) Re-assemble in reverse order; ensure that all joints and seals are

correctly re-fitted.

COMBUSTION CHAMBER

9.6

FRONT INSULATION

The design of the appliance is such that the combustion chamber
insulation should not require replacement unless mechanically
damaged. It is recommended that to prevent dust, the insulation be
dampened prior to removal, and that a protective mask is worn when
changing or handling the insulation material.

Refer to Figure 41
a) Ensure supply voltage is isolated, and that the gas supply is isolated.
b) Remove the gas control valve, fan & burner assembly; refer to

section 6.2.

c) Remove the electrodes; refer to section 9.1.
d) Remove the burner: refer to section 9.5.
e) Replace the combustion chamber front insulation.
f) Re-assemble the burner and electrodes, using new gaskets.
g) Check the position of the electrodes: refer to section 6.4.
h) Re-assemble in reverse order; ensure that all joints and seals are

correctly re-fitted.

COMBUSTION CHAMBER FRONT INSULATION

41

FRONT

INSULATION

INNER

SEAL

OUTER

SEAL

COMBUSTION CHAMBER

9.7

REAR INSULATION

Refer to Figure 42
a) Ensure supply voltage is isolated, and that the gas supply is isolated.
b) Remove the gas control valve, fan & burner assembly; refer to

section 6.2.

c) Use an Allen key to undo the central screw holding the rear

insulation in place.

d) Remove old insulation and fit replacement, ensuring locating

washer is in front.

e) Re-assemble in reverse order; ensure that all joints and seals are

correctly re-fitted.

COMBUSTION CHAMBER REAR INSULATION

42

SCREW

WASHER

REAR

INSULATION

HEAT EXCHANGER

9.8

Refer to Figures 15 & 43
a) Ensure supply voltage is isolated, and that the gas supply is isolated.
b) Remove the gas control valve, fan & burner assembly; refer to

section 6.2.

c) Disconnect the electrical leads to the flue sensor, flow sensor and

return sensor.

d) Drain down the appliance; refer to section 9.24.
e) Disconnect the flue system from the appliance, 4 screws, and lift up

to disengage the flue from the flue hood; refer to Figure 15.

f) Remove the retaining clip from the heat exchanger flow outlet, and

undo the nut connecting the flow pipe to the plate-to-plate heat
exchanger. On SBX appliances undo the nut connecting the flow pipe
to the CH flow isolating cock; refer to Figure 43.

g) Rotate the flow pipe anticlockwise and gently pull down to

disengage the flow pipe from the heat exchanger.

h) Remove the retaining clip from the heat exchanger return inlet, and

undo the nut connecting the flow pipe to the hydroblock adaptor
fitting.

i) Rotate the return pipe clockwise and gently pull down to disengage

the return pipe from the heat exchanger.

35

751030 MANUAL (NEW) 21/9/10 08:41 Page 24

If the gas control valve is changed, then when the
appliance is running, the flue gas CO
measured, refer to section 6.1, and compared to the
values stated section 2.3. If the measured value does
not correspond to the Performance Data, then
contact: Halstead Boilers Ltd. Service Help line:
0844 371 1111.

Always seal the gas valve adjustment screw with
paint after adjustment

FAN

9.4

Refer to Figures 35, 36, & 37
a) Ensure supply voltage is isolated, and that the gas supply is isolated.
b) Remove the gas control valve, fan & burner assembly; refer to

section 6.2.

c) Remove the gas control valve including air inlet cowl; refer to

section 9.3.

d) Unscrew the three screws holding the lower section of the black

plastic air inlet cowl and gas valve mounting plate, remove plate and
cowl; refer to Figures 35 and 36.

e) Unscrew the four screws holding the fan to the burner manifold, and

remove fan; refer to Figure 37.

f) Attach and secure the replacement fan, replace the gasket.
g) Re-assemble in reverse order; ensure that all joints and seals are

correctly re-fitted.

should be

2

MANIFOLD MOUNTING SCREWS

38

WITHDRAWING BURNER

39

3 TORX
SCREWS

GAS VALVE MOUNTING PLATE

36

FAN MOUNTING SCREWS

37

4 SCREWS

GASKET

GAS VALVE
MOUNTING PLATE

3 SCREWS

40

LOCATING TAB

BURNER GASKET

34

751030 MANUAL (NEW) 21/9/10 08:41 Page 25

4b

Domestic Hot Water Mode (CBX)

BURNER &

BURNER
FLANGE

PRIMARY

FLOW

CH

RETURN

DHW COLD

INLET

FILLING

LOOP

FLOW

TURBINE

CH

FLOW

PRIMARY HEAT

EXCHANGER

CH FLOW

THERMISTOR

CH RETURN

THERMISTOR

AUTOMATIC AIR VENT

PUMP &

HYDROBLOCK

PLATE HEAT

EXCHANGER

PRESSURE

GAUGE

3 BAR

PRESURE

RELIEF VALVE

PRIMARY

RETURN

FLUE

PRODUCTS

DHW

HOT

OUTLET

EXPANSION

VESSEL

CONDENSATE
TRAP

CONDENSATE

OUTLET

4c

Central Heating Mode (SBX)

BURNER &

BURNER

FLANGE

PRIMARY

FLOW

CH

RETURN

THERMISTOR

AUTOMATIC AIR VENT

PUMP &

HYDROBLOCK

PRESSURE

CH

FLOW

PRIMARY HEAT

EXCHANGER

CH FLOW

CH RETURN

THERMISTOR

GAUGE

3 BAR

PRESURE

RELIEF VALVE

SECONDARY RETURN

(FROM STORAGE TANK

IF REQUIRED)

FLUE

PRODUCTS

CONDENSATE

OUTLET

EXPANSION

VESSEL

CONDENSATE
TRAP

11

751030 MANUAL (NEW) 21/9/10 08:41 Page 26

3

3.1

GAS SAFETY (INSTALLATION AND USE) REGULATIONS 1996 (AS
AMENDED)

The appliance is suitable only for installation in GB and IE and should
be installed in accordance with the rules in force.

In GB, a CORGI Registered Installer must carry out the installation. It
must be carried out in accordance with the relevant requirements
of the:

Gas Safety (Installation and Use) Regulations

The appropriate Building Regulations either The Building
Regulations, The Building Regulations (Scotland), Building
Regulations (Northern Ireland).

The Water Fitting Regulations or Water Byelaws in Scotland.
The Current I.E.E Wiring Regulations.

Where no specific instructions are given, reference should be made to
the relevant British Standard code of Practice.

In IE, the installation must be carried out by a Competent Person and
installed in accordance with the current edition of I.S.813 “Domestic
Gas Installations”, the current Building Regulations and reference
should be made to the current ETCI rules for electrical installation.

It should also be in accordance with the relevant recommendations in
the current editions of the following British Standards and Codes of
Practice: BS 5449, BS 5546, BS 5440-1, BS 5440-2, BS 6798, BS 6891,
Institute of Gas Engineer document IGE/UP-7, BS 7074 (expansion
vessel), BS 5482 (propane installations) and IS813 for IE.

IMPORTANT NOTE: Manufacturer's instruction must NOT be taken in
any way as overriding statutory obligations.

3.2

THE FOLLOWING LIMITATIONS MUST BE OBSERVED WHEN SITING
THE APPLIANCE:

a) The appliance is not suitable for external installations. The

position selected for installation should be within the building,
unless otherwise protected by a suitable enclosure and MUST
allow adequate space for installation, servicing and operation of
the appliance and for air circulation around it (Section 2.4 and

3.4).

b) This position MUST allow for a suitable flue system and terminal

position. The appliance must be installed on a flat vertical wall,
which is capable of supporting the weight of the appliance and any
ancillary equipment.

c) If the appliance is to be fitted in a timber framed building it should

be fitted in accordance with the British Gas publication 'Guide for
Gas Installations In Timber Frame Housing', Institute of Gas
Engineers document IGE/UP-7. If in doubt, advice must be sought
from the Local Gas Supplier.

d) The appliance is approved to a protection rating of IP33.

Therefore if the appliance is to be installed in a room containing
a bath or a shower, any electrical switch or control utilising mains
electricity must be so situated that it cannot be touched by a
person using the bath or shower. Attention is drawn to the
requirements of the current BS 7671 (I.E.E Wiring Regulations)
and in Scotland the electrical provisions of the Building
Regulations applicable in Scotland.

INSTALLATION REQUIREMENTS

STATUTORY REQUIREMENTS

APPLIANCE LOCATION

FLUE TERMINAL POSITION

3.3

DETAILED RECOMMENDATIONS FOR FLUE INSTALLATION ARE
GIVEN IN BS 5440-1. THE FOLLOWING NOTES ARE FOR GENERAL
GUIDANCE.

a) The appliance MUST be installed so that the terminal is exposed to

the external air.

b) It is important that the position of the terminal allows free passage

of air across it at all times.

c) It is ESSENTIAL TO ENSURE that products of combustion

discharging from the terminal cannot re-enter the building or any
other adjacent building, through ventilators, windows, doors, other
sources of natural air infiltration, or forced ventilation / air
conditioning.

d) The minimum acceptable dimensions from the terminal to

obstructions and ventilation openings are specified in Figure 6.

e) If the terminal discharges into a pathway or passageway check that

combustion products will not cause nuisance and that the terminal
will not obstruct the passageway.

f) Where the lowest part of the terminal is fitted less than 2000 mm (78

in) above the ground, above a balcony or above a flat roof to which
people have access, the terminal MUST be protected by a purpose
designed K6 terminal guard (optional extra: Part No. 951507).

g) The air inlet / flue outlet MUST NOT be closer than 25 mm (1 in) to

combustible material.

h) Condensing appliances have a tendency to form a plume of water

vapour at the terminal under certain operating conditions. This is
normal but positions where this would cause damage or a nuisance
should be avoided. Consideration should be given to the dispersal of
the plume in terms of adjacent surfaces and neighbouring
properties. A special flue terminal, (Kit C), is available to raise the
flue discharge point; use of this terminal will limit the maximum
flue length available.

For further information contact: Halstead Boiler Ltd, Service Help
Line: 0844 371 1111.

VENTILATION REQUIREMENTS

3.4

Detailed recommendations for air supply are given in BS 5440-2.
The following notes are for general guidance.
a) It is not necessary to have a purpose provided air vent in the room

or internal space in which a room-sealed appliance is installed.

b) Cupboard or compartment ventilation is not necessary for a room-

sealed appliance providing that the minimum clearances are
maintained.

c) Where an open flued, (B23), system is used, then an air vent must be

provided in the same room or internal space as the flue duct air
inlet, with a minimum free-area of at least:

CBX 38 159 cm
CBX 32 128.5 cm
CBX 24 87.5 cm

SBX 30 117 cm

2

2

2

2

12

751030 MANUAL (NEW) 21/9/10 08:42 Page 27

GAS CONTROL VALVE

9.3

INCLUDING AIR INLET COWL

Refer to Figures 33, 34 & 35
a) Ensure supply voltage is isolated, and that the gas supply is isolated.
b) Remove the gas control valve, fan & burner assembly; refer to

section 6.2.

c) Unscrew four screws holding the gas feed pipe, and remove gas feed

pipe, refer to Figure 33.

Note: Newer versions may have a single flange nut securing the gas
feed pipe.

d) Unscrew three torx screws (T-20), and remove gas control valve,

refer to Figure 34

e) Unclip the top section of the black plastic air inlet cowl from the fan

assembly, and remove white plastic insert, clean or replace as
necessary, refer to Figure 35.

f) Refit or replace the top section of the black plastic air inlet cowl,

ensuring that it is clipped into place and that the holes in the white
plastic insert are aligned with the fixing holes.

g) Attach and secure the gas feed pipe to the replacement gas valve,

using a new gasket.

h) Attach and secure the replacement gas control valve to the fan

assembly.

i) Re-assemble in reverse order; ensure that all joints and seals are

correctly re-fitted.

Note: The gas control valve is factory set and sealed and is not
adjustable. If the gas control valve is changed, then when the appliance
is running, the flue gas CO
and compared to the values stated in Performance Data, section 2.2. If
the measured value does not correspond to the Performance Data, then
contact: Halstead Boilers Ltd. Service Help line: 0844 371 1111.

should be measured, refer to section 6.1,

2

GAS FEED PIPE CONNECTION TO GAS

33

CONTROL VALVE

4 SCREWS

GAS CONTROL VALVE

34

9.3.2

!

the gas supply is metered and ascertain whether it is possible to
measure the gas rate. If the gas input rate can be measured then the
requirements of GSIUR 26(9) can be met, including any specific
requirements in manufacturers’ instructions.

If gas input rate cannot be measured then, to satisfy the intent of
GSIUR 26(9), the engineer shall measure the combustion quality of the
appliance in accordance with BS 7967 or the manufacturers’
instructions.

If the engineer does not have the required equipment and no
alternative test is specified by the manufacturer then the appliance
shall be turned off and disconnected as an un-commissioned appliance
until such time that equipment is available to undertake such tests.

If a new gas valve is fitted it must be adjusted as per the instructions
that are supplied with the new gas valve.

A suitable, calibrated flue gas analyser is required to measure the CO

COMBUSTION CHECK SET-UP

When installing, commissioning or servicing a gas
appliance that incorporates a pre-mix burner and zero­set governor, because it is not possible to measure an
operating pressure the engineer should first check that

IMPORTANT: After any adjustment of the gas valve,

it is essential to check the combustion levels at

!

minimum gas rate (table 2.3). If the Carbon Monoxide
or Carbon Dioxide levels are outside the range
quoted, call Halstead Boilers Ltd Technical Helpline
on 0844 371 1111. If in doubt ASK!

2

3 TORX

SCREWS

AIR INLET COWL

35

.

SWIRL PLATE

AIR INLET COWL TOP

AIR INLET COWL BOTTOM

33

751030 MANUAL (NEW) 21/9/10 08:42 Page 28

9

Before commencing any service operation, ISOLATE the mains electrical
supply and TURN OFF the gas supply at the main service cock.

Replacement of most parts first requires the removal of the sealed
chamber front panels; refer to section 6.2.

There may be some slight water spillage; so electrical components
should be protected.

It is the law that any service work must be carried out by a registered
person.

9.1

Refer to Figure 31
a) Ensure supply voltage is isolated, and that the gas supply is isolated.
b) Remove the gas control valve, fan & burner assembly; refer to

section 6.2.

c) Unscrew the two screws holding the electrode, remove electrode,

and used gasket.

d) Fit the new electrode, and new gasket.

31

REPLACEMENT OF PARTS

IGNITION AND DETECTION ELECTRODES

ELECTRODE PLUG

SCREW

ELECTRODE (IGNITION)

e) Check that electrode is aligned as detailed in Figures 26(a) or 26(b).
f) Re-assemble in reverse order. Ensure that all joints and seals are

correctly re-fitted.

IGNITER UNIT AND IGNITION LEADS

9.2

Refer to Figure 32
a) Ensure supply voltage is isolated.
b) Remove the plug and earth lead from the ignition electrode.
c) Remove the electrical supply leads.
d) Unscrew the two screws holding the igniter unit, remove igniter

unit.

e) Fit the new igniter unit.
f) Re-assemble in reverse order; ensure that the igniter unit is

orientated as shown in Figure 32, and that the brown electric supply
lead is fitted to position 1 on the igniter unit.

g) Ensure that all joints and seals are correctly re-fitted.

ELECTRODE (DETECTION)

32

IGNITOR UNIT AND IGNITION LEADS

GASKET

SCREW

IGNITION

MODULE

IGNITION LEAD

EARTH LEAD

IGNITION ELECTRODE

32

SCREW

751030 MANUAL (NEW) 21/9/10 08:42 Page 29

FLUE TERMINAL POSITION

5

SPECIAL REQUIREMENTS FOR A
VERTICALLY BALANCED FLUE

Position Minimum spacing

A Directly below an openable window, 300mm 12in

air vent, or any other ventilation
opening

B Below gutter, drain/soil pipe 75mm 3in
C Below eaves 200mm 8in
D Below a balcony 200mm 8in

E From vertical drain pipes and 150mm 6in

soil pipes

F From internal or external corners 300mm 12in

*internal corners *1000mm 40in

G Above adjacent ground or

balcony level 300mm 12in

H From a surface facing the terminal 600mm 24in

I Facing terminals 1200mm 48in

J From opening (door/window) in 1200mm 48in

carport into dwelling *not recommended

K Vertically from a terminal on the 1500mm 60in

same wall

L Horizontally from a terminal on the 300mm 12in

same wall

M Adjacent to opening 300mm 12in
N Below carport 600mm 24in

O From adjacent wall 300mm 12in
P From adjacent opening window 1000mm 40in
Q From another terminal 600mm 24in
R Minimum height 300mm 12in

*Recommended by the boiler manufacturing industry to prevent pluming
nuisance and damage to buildings.

*2500mm 98in

*2500mm 98in

*2500mm 98in

*not recommended

d) If the appliance is installed in a room or internal space with other

opened flued appliances, then the size of the air vent necessary
should be calculated in accordance with BS 5440-2 Table 2.

e) Where an open flued system is used, and the flue duct air inlet is

within a compartment then high and low level air vents are
necessary in the compartment, the size of the vents should be
calculated in accordance with BS 5440-2 Table 2.

CONDENSATE DISPOSAL

3.5

The condensate drain connection is suitable for either 21.5 mm or 22
mm plastic push fit or adhesive overflow pipes and fittings. It should
be piped to drain, preferably within the building, maintaining a
continuous 2.5° fall away from the appliance. If the drain is routed to
outside it should be to a drain or soak away, and any external pipe
work should be in 32 mm. Insulation to protect from freezing in cold
weather conditions is also advisable. Note if the appliance is installed
in a garage all pipe work should be in 32 mm. Ensure that the
condensate discharge system complies with any local regulations in
force.

GAS SUPPLY

3.6

a) The Gas Supplier should be consulted at the installation planning

stage in order to establish the availability of an adequate supply
of gas.

b) An existing service pipe MUST NOT be used without prior

consultation with the Gas Supplier.

c) A gas meter can only be connected by the Gas Supplier or by

their contractor.

d) An existing meter and/or pipe work should be of sufficient size

to carry the maximum appliance input plus the demand of any
other installed appliance. (BS 6891: 1988).

A minimum of 22 mm diameter pipe work is recommended within
1000 mm of the appliance gas cock.

e) Natural gas appliances: The governor at the meter must give a

constant outlet pressure of 20 mbar (8 in.wg) when all appliances
on the system are running.

Propane appliances: The regulator must give a constant outlet
pressure of 37 mbar (14.9 in.wg) when all appliances on the
system are running.

f) The gas supply line should be purged. WARNING: Before purging

open all doors and windows, also extinguish any cigarettes,
pipes, and any other naked lights.

g) The complete installation must be tested for gas tightness.

CENTRAL HEATING SYSTEM

3.7

a) The appliances incorporate all the components necessary to

allow them to be connected to a sealed central heating system.
Refer to Figure 7a for a typical system design, which
incorporates radiators, and a drain facility that must be provided
at the lowest point in the system to allow complete drain down.

b) The installation should be designed to operate with a flow

temperature of up to 95 °C.

c) A sealed system must only be filled by a competent person.
d) The available pump head for the appliances are given in

Figure 6.

e) If thermostatic radiator valves are fitted, a radiator must be fitted

with two lock shield valves, to enable correct operation of the
pump-overrun facility.

13

751030 MANUAL (NEW) 21/9/10 08:42 Page 30

f) The following paragraphs outline the specifications of the items

fitted to the appliances.

PUMP - The available pump head shown in Figure 6 is that in excess of
the appliance hydraulic resistance, i.e. that available for the system.

AVAILABLE PUMP HEADS

6

SBX 30 & CBX 38
CBX 32
CBX 24

7

6

0)

2

5

4

3

Pump Head (m H

2

1

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Flow Rate ltr/min

EXPANSION VESSEL - The integral expansion vessel is pre-charged to
a pressure of between 0.5 and 1.0 bar. This should be checked before
the water system is filled. Details below show the water system volume
that is acceptable for this vessel. If the system water volume is larger
then an additional vessel must be fitted to the system. BS 5449 and BS
6798 give further details regarding expansion vessel sizing and sealed
systems.

Expansion Vessel Requirements

Vessel charge and bar 0.5 0.75 1.0 1.5
initial system pressure

Total water content of system
using 8 L (1.54 gal) capacity L 96 84 73 50
expansion vessel supplied
with appliance.

For systems having a larger
capacity multiply the total
system capacity in litres
(gallons) by these factors to 0.0833 0.093 0.109 0.156

obtain the total minimum
expansion vessel
capacity required in litres.

FILLING LOOP

A filling loop is supplied loose with the appliance for connecting the
mains water supply to the CH system so that the system can be filled on
installation or whenever water pressure has been removed for system
modifications, etc. The filling loop complies with the current water
supply (water fittings) regulations.

Methods of filling a sealed system are shown in Figure 8.

WATER TREATMENT, CLEANSING AND FLUSHING THE HEATING
SYSTEM

NOTE: British Standard BS7593: 1992 stresses the importance of

cleansing and flushing of the system to ensure it continues to run
efficiently with the minimum of maintenance necessary. Halstead
Boilers fully support this professional approach and recommend that
the system is cleansed with an effective chemical cleanser and
protected long term with a suitable inhibitor. Such products are
available from Fernox and Sentinal.

CONTROLS. As a minimum it is recommended that a room thermostat
be installed to control the appliance. Thermostatic radiator valves may
be fitted to the system, however they must not be fitted in the room
where the room thermostat is fitted. There must be at least one radiator
installed with lock shield valves that should not be closed. Further
guidance can be obtained from the Domestic Heating and Hot Water
Guide to the building regulations.

DOMESTIC HOT WATER SYSTEM

3.8

(CBX APPLIANCES ONLY)

a) Check that the mains water pressure is sufficient (as stated in 2.2

“Performance Data”) to produce the required DHW flow rate, but
does not exceed the maximum DHW pressure (10 bar). If
necessary, a pressure-reducing valve must be fitted to the mains
supply before the DHW inlet connection.

b) The final 600 mm (24 in) of the mains supply pipe to the boiler must

be copper.

c) Avoid long DHW pipe runs and several hot water draw off points.
d) Insulate the hot water pipes if accessible to minimise the heat

losses within the pipes to keep the water hot longer.

e) A domestic hot water regulator is fitted within the appliance to

control the maximum water flow rate. This may be removed to
obtain higher flow rates. Higher flow rates will not damage the
appliance but may reduce the water temperature below an
acceptable level.

DOMESTIC HOT / COLD WATER SUPPLY TAPS AND MIXING TAPS.

All equipment designed for use at mains water pressure is suitable.

SHOWERS & BIDETS.

Any mains pressure shower or bidet complying with the Local Water
Undertaking byelaws is suitable.

PRESSURE GAUGE - A pressure gauge is situated on the appliance
control panel. This can be viewed by lowering the bottom front panel.

PRESSURE RELIEF VALVE - A pressure relief valve set to 3 bar (43.5 psi)
is supplied with the appliance, however it will start to open at
approximately 2.7 bar. It should not be used to flush the system.

14

751030 MANUAL (NEW) 21/9/10 08:42 Page 31

LED CODE FAULT/EFFECT REASON ACTION

1 2 3 4

● Check no air is in heat exchanger/CH system

● Check pump operation

❍❍❍● Overheated appliance Water temperature greater than 105 °C

● Check diverter valve operation

● Check PCB/X1C connector

● Check mains lead to pump

● Check flow thermistor

● Check gas supply

❍❍●❍ No gas/No flame Low gas pressure

● Check gas service cock

● Check gas valve and lead

● Check detection electrode/lead

❍❍●● Lockout flame signal/ No flame signal on ignition, or loss

Lockout after 5 ignition of signal during operation

attempts

● Check gas supply

● Check gas valve and lead

● Check PCB/X2A & X2B connectors

● Check spark generator/spark electrode

● Check mains earth lead continuity

● Check flue sensor

❍●❍❍ Flue gas sensor/ Flue gas temperature greater than 95 °C

No flame

● Check flue system

● Check no air is in heat exchanger/CH system

● Check pump

● Check PCB/PCB connectors

❍●❍● Defective sensor/ Defective flow, return or flue sensor

No flame

❍●●❍ Defective gas valve/

Flame continues after
demand ends

5 sec flame signal after
burner is switched off

● Check flow, return and flue sensors

● Check wiring to sensors

● Check PCB/X6 & X8 connectors

●

Check gas valve and lead

●

Check PCB

● Check fan

● Check mains fan lead & connector

❍●●● Defective fan/No flame Missing or Erroneous RPM signal

● Check low voltage fan lead & connector

● Check PCB/X3 connector

● Check pump operation

● Check diverter valve operation

●❍❍❍ CRC error/No flame Internal Eprom data error ● Check PCB

●❍❍● Error in power supply/ Low mains voltage

No flame ● Check PCB connectors

● Check mains voltage

● Check water pressure

●❍●❍ Water flow failure/

Flame for a short Sensor temperature differential incorrect
period only

● Check pump

● Check no air is in heat exchanger/CH system

● Check flow, and return sensors

● Check wires to sensors not crossed

●❍●● PCB error/No flame Internal error ● Check PCB

●●❍❍ BCC error/No flame Incorrect /missing BCC ● Reseat or replace BCC

●●❍● Differential check faulty/

Flame for 15 seconds

●●●❍ Activate BCC/No flame New BCC ● Press reset to activate

●●●● Safety system failure/

No flame

Zero check faulty DHW or CH

Failure of internal self checking system

● Check flow, and return sensors

● Check wires to sensors not crossed

● Check PCB

● Check PCB

● Check DHW turbine & lead

❍❍❍❍ DHW cold Defective DHW turbine or Diverter valve

● Check Diverter valve & lead

● Check PCB/X4 connector

● Check filter in plate heat exchanger

● Check power supply

❍❍❍❍ No light indication Defective power supply

● Check PCB/X1B connector

● Check PCB fuse

❍❍❍❍ No flame Faulty connector

● Check PCB/X1A connector

31

751030 MANUAL (NEW) 21/9/10 08:42 Page 32

8

8.1

Before looking for a fault condition, check that:

● The mains electrical supply is turned on.

● The clock, room or cylinder/tank thermostat (where fitted) are

calling for heat.

● The gas service cock is open.

● The CH and DHW isolation cocks are open.

● The system is at design pressure.

Before attempting any electrical fault finding, always conduct the
preliminary electrical system checks as described in the Instructions
for the British Gas Multimeter, or other similar instrument.

On completion of any service or fault finding operation involving making
or breaking electrical connections, always check for EARTH
CONTINUITY, POLARITY and RESISTANCE TO EARTH.

Detailed procedures for replacing faulty components are described in
section 9 (Parts Replacement).

30

FAULT FINDING

GENERAL

FASCIA PANEL

LED 1 LED 2

For further information contact: Halstead Boilers Ltd. Service Help line:
0844 371 1111.

DIAGNOSTIC LED INDICATORS

8.2

FASCIA PANEL, Figure 30

The Reset LED shows steady RED in a lockout condition and the error
code will be displayed by the 4 yellow lights above the two control knobs.

For fault finding, refer to the diagnostic chart shown below, together
with the notes given in sections 8.3, 8.4 and 8.5.

Depending on the fault condition, the boiler can be reset by pressing the
RED Reset light.

FAULT FINDING CODES

8.3

In the event of the appliance failing to light, refer to the Diagnostics
Chart.

LED 3 LED 4

RESET & burner/
lock-out LED

PRESSURE

CLOCK

DOMESTIC HOT WATER FAULT

8.4

GAUGE

FINDING (CBX APPLIANCES ONLY)

When the hot water tap is turned on, the control should perform a series
of checks followed by an ignition sequence. Refer to section 5.2.

If the control has powered up correctly but does not respond to a DHW
demand, check the following:

a) Check that the DHW flow rate at the tap is greater than 2.5

litre/minute.

b) Check the operation of the DHW flow turbine, Figure 28.
c) Check the wires to the DHW flow turbine.
d) Check connector X8 is correctly connected to the PCB.

If the above items are ok, replace the PCB.
If DHW temperature fluctuates heavily during a long draw off, check the

secondary plate heat exchanger filter for debris, clean and replace,
(refer to section 9.19).

30

DHW TEMP
CONTROL

CH TEMP
CONTROL

CENTRAL HEATING FAULT FINDING

8.5

Upon a demand for Central Heating, (closure of the time switch and room
thermostat, where fitted), the controls should carry out a set of start up
checks, followed by an ignition sequence. Refer to Section 5.2.

If the control has powered up correctly but does not respond to a CH
demand. Check voltage between pin 2 connector X1A (orange wire) and
pin 2 connector X1B (blue wire). If 0 V ac, check room thermostat and
clock. If 230 V ac, check control for lockout or blocking codes, (refer to
section 8.3), check operation of the pump.

Note: Whenever a CH demand is removed, either by the timer, the room
thermostat or by the appliance's internal temperature control, an anti
cycle mode is initiated which prevents the appliance from firing in CH
mode for 5 minutes. Ensure that the control is not in this mode by
removing power from the control and restoring it after a delay of 10
seconds.

If room thermostat and clock are OK and no lockout or blocking code
exists and the control is not in anti cycle mode, then replace PCB.

ON/OFF
SWITCH

GAS SUPPLY

PRESSURE

REDUCING

VALVE (if required)

BS STOP VALVE

(Fixed Spindle)

MAINS WATER

7b

751030 MANUAL (NEW) 21/9/10 08:43 Page 33

7a

TYPICAL SYSTEM DESIGN FOR EDEN CBX

APPLIANCE

ROOM
THERMOSTAT

RADIATOR WITH

2 LOCKSHIELD

VALVES IN OPEN

DRAIN COCK AT
LOWEST POINT
IN SYSTEM

OPTIONAL SYSTEM DESIGN WITH UNVENTED STORAGE

7b

CYLINDER FOR EDEN SBX

ROOM STAT.

2 CHANNEL DHW / CH

STANDARD TIMESWITCH

JUNCTION BOX

POSITION

BOILER

MAINS
WATER IN

CH FLOW

CH RETURN

DOMESTIC
COLD WATER

R = RETURN
F = FLOW

TIME
CLOCK

PRESSURE
RELIEF OUTLET TO
DRAIN

DOMESTIC
HOT WATER
OUT

DOMESTIC
HOT WATER

GAS SUPPLY

PRESSURE REDUCING
VALVE (if required)

BS STOP VALVE
(Fixed Spindle)

MAINS WATER

CYLINDER

CONTROL STAT.

For information please contact Halstead Boilers
Technical Helpline: 0844 371 1111

F

R

SPRING LOADED BYPASS

F

2 x TWO-PORT
SPRING RETURN VALVES

DRAIN COCK AT LOWEST
POINT IN THE SYSTEM

NOTE (CBX circuit): No automatic by-pass required. However it is recommended to
leave one radiator open to ensure pump over-run function. It is also recommended to
fit TRV’s on all radiators except in rooms with a room thermostat

NOTE (SBX circuit): For detailed system designs see the seperate booklet supplied
with the boiler.

15

751030 MANUAL (NEW) 21/9/10 08:43 Page 34

ELECTRICITY SUPPLY

3.9

a) Wiring external to the appliance must be in accordance with the

current I.E.E Wiring regulations (BS 7671) for electrical installation
and any local regulations, which apply.

b) The mains cable must be at least 0.75 mm2 (24/0.2 mm) PVC

insulated to BS 6500 table 16.

c) THIS APPLIANCE MUST BE EARTHED. Failure to provide a

satisfactory earth connection will result in appliance malfunction.

d) The method of connection to the mains supply must facilitate

complete electrical isolation of the appliance. Either a 3A fused
three pin plug and un-switched shuttered socket outlet, both
complying with BS 1363, or a 3A fused double pole switch having a
3 mm contact separation in both poles and serving only the boiler
(and its external controls) may be used.

8

ALTERNATIVE METHODS OF FILLING A SEALED SYSTEM

FLEXIBLE HOSE UNION
TEMPORARY CONNECTION
To be removed imediately after filling

DOUBLE

STOP

CHECK

VALVE

VALVE
ASSEMBLY

3.10

EXTERNAL CONTROLS

The CBX appliances may be used with any certified mains voltage room
thermostat, and the SBX appliances with any certified
programmer/room thermostat, as described in section 4. A low voltage
DHW cylinder / tank sensor is available as a kit, for use with SBX
appliances.

For further information contact: Halstead Boilers Ltd, Service Helpline:
0844 371 1111.

METHOD A

STOP
VALVE

HEATING
SYSTEM
RETURN

Note:

The appliance
has a built in
filling loop.

MAINS WATER
SUPPLY

MAINS
WATER SUPPLY

METHOD B

RECOMMENDED AND APPROVED METHOD
FOR FILLING A CLOSED CIRCUIT IN A HOUSE.
(R24-2a WATER REGULATIONS GUIDE)

CISTERN &
OVERFLOW

PRESSURE PUMP
& REDUCING VALVE
IF REQUIRED

STOP
VALVE

HEATING
SYSTEM
RETURN

16

751030 MANUAL (NEW) 21/9/10 08:43 Page 35

7

29

INTERNAL WIRING DIAGRAMS

7.1 FUNCTIONAL FLOW WIRING DIAGRAM

29

751030 MANUAL (NEW) 21/9/10 08:43 Page 36

CONDENSATE DRAIN

27

SUMP ADAPTOR

PIPE RETAINING
CLIP

FLOW TUBE

28

TRAP TUBE

LOCK NUTS

DRAIN SUMP CAP

SEALED WATER SYSTEM

6.8

a) Check the operation of the pressure relief valve as described in

section 5.1.

b) Check the correct operation of the pressure gauge by noting the

reading when cold and check that the pressure increases with
temperature. Replace the gauge if readings are suspect.

c) Check that the system is at its original (cold) design pressure. If

necessary, re-pressurise the system as described in section 5.1 and
search for and rectify any leaks causing loss of water.

d) In case of heavy pressure fluctuations during the heat and cool down

cycle, check the pre-charge pressure of the expansion vessel. If the
air pressure is less than 0.75 bar recharge vessel with an air pump.

CONDENSATE
DRAIN

MAINS COLD INLET

CONICAL FILTER

SEALING WASHER

FLOW REGULATOR

FLOW TURBINE

RE-ASSEMBLY & RE-COMMISSIONING

6.9

a) Re-assemble all components in reverse order.
b) Check that all joints and seals are correctly fitted.
c) Turn on the gas and electricity supply and light the appliance, as

described in section 5.2.

d) Re-perform a combustion check, as described in section 6.1.
e) Check the operation of the appliance in both CH and DHW modes as

applicable.

f) Remove the manometer and tighten the inlet pressure test point

sealing screw.

g) Test for gas tightness.

6.10

a) Ensure the fascia panel into the upright position and secure with

b) Re-fit the front casing panel.
c) Return all appliance and external controls (if fitted) to their original

FINAL CHECKS

the two screws.

settings.

28

751030 MANUAL (NEW) 21/9/10 08:43 Page 37

4

APPLIANCE INSTALLATION

Before installing the appliance, check that the chosen location is
suitable (section 3.2) and that the requirements for flue position (section

3.3) and minimum clearances (Figure 1b) are satisfied.

UNPACKING THE APPLIANCE

4.1

The appliance is supplied in one box. Flue kits are provided separately,
the various flue kits available as described in sections 2.5 - 2.7. If the
appliance is to be installed without access to an external wall, a wall
liner kit is also required.

Unpack the boxes and check the contents:

G

Complete appliance

G

Paper wall mounting template

G

Wall mounting plate

G

Plumbing jig

G

Installation and Servicing Instruction

G

User's Instructions

G

Benchmark book

G

Hardware pack containing:
50 mm x No 10 wood screws - 4 off

Wall plugs - 4 off
22 mm copper street elbows ­2 off (3 off SBX appliance)

Manual Handling Note:

During the appliance installation it will be necessary
to employ caution and assistance whilst lifting, as the
appliance exceeds the recommended weight for a
one-man lift. Take care to avoid trip hazards, slippery
or wet surfaces.

g) Enter the bottom two fixing screws into the wall plugs and tighten

up all four screws.

If required, service connections may be made now before mounting
the appliance - Refer to section 5.

Pipe work may be routed from above or below the
appliance as required.

9

PLUMBING

JIG

CBX

MARK POSITION

OF TOP AND

SIDES

WALL

FIXING HOLES

BOILER

LOCATING

TABS

WALL
MOUNTING
PLATE

WALL PLATE

LOCATING TABS

WALL

FIXING HOLES

PREPARING THE WALL

4.2

a) Fix the paper template in the required position (ensuring that the

necessary clearances are achieved). Ensure squareness by hanging
a plumb line.

b) Mark the position of the wall mounting plate-fixing holes (4). Select

one from each group. Refer to Figure 10.

c) Mark the position of the flue outlet. For side flue installation extend

the flue centre line on to the sidewall, where the flue length exceeds
775 mm, a flue slope angle of 2.5° needs to be taken into account.
Refer to Figure 10. Remove the paper template.

d) Cut the hole in the wall for the air/flue duct (preferably with a core-

boring tool). The hole must be horizontal and not be less than 100
mm in diameter. If the hole is not accessible from outside, its
minimum diameter must be sufficient to allow insertion of the wall
liner (130 mm, 5in). The wall liner is available as an optional extra
and must be sealed in position with mortar (or equivalent).

e) Drill the four fixing holes using a 6mm drill and insert the wall plugs

provided.

f) Hang the wall mounting plate using two fixing screws in the top,

ensuring that it is level. Hook the plumbing jig onto the two bottom
locating tabs of the wall mounting plate. Refer to Figure 9.

PLUMBING

JIG

SBX

MARK POSITION

OF TOP AND

SIDES

WALL

FIXING HOLES

BOILER

LOCATING

TABS

WALL
MOUNTING
PLATE

WALL PLATE

LOCATING TABS

WALL

FIXING HOLES

17

751030 MANUAL (NEW) 21/9/10 08:43 Page 38

10

11(a) REAR FLUE 11(b) SIDE FLUE

97mm - CBX 24/32 & SBX 30

105mm - CBX 38

225.2

MOUNTING THE APPLIANCE

4.3

Refer to Figure 11
a) Lift the appliance into position approximately 10 mm above the top

of the wall mounting plate and use the side wings on the plate to
locate the appliance horizontally. Then carefully lower the
appliance, ensuring that the top locating tabs are securely engaged.

b) Connect the central heating system pipes to the central heating flow

and return pipes on the boiler.

Pipe work may be routed from above or below the
appliance as required.

225.2

POSITION OF

DUCT HOLE

POSITION OF WALL

MOUNTING PLATE

150

12a

2.5º

CBX SERVICE CONNECTIONS

SERVICE
CONNECTION
PIPES NOT
SUPPLIED

MAINS
CENTRAL
HEATING

RETURN

WATER IN

& FLOW

TURBINE

GAS

SUPPLY

DOMESTIC

HOT WATER

OUT

97mm - CBX 24/32 & SBX 30

105mm - CBX 38

CENTRAL

HEATING

FLOW

CENTRAL HEATING & DOMESTIC HOT

4.4

WATER SERVICE CONNECTIONS

Refer to Figure 12

Commission the central heating system and domestic hot water system,
for CBX appliances as described in section 5.1, and then proceed to
Section 4.5.

MOUNTING THE APPLIANCE

11

SIDE WINGS

LOCATING TABS

LIFTING POINT

18

43mm
108mm
169mm
240mm
305mm

351.5mm

411.5mm
448mm

12b

43mm

169mm
240mm
305mm

351.5mm

411.5mm
448mm

FILLING

LOOP

SBX SERVICE CONNECTIONS

SERVICE
CONNECTION
PIPES NOT
SUPPLIED

SECONDARY

CENTRAL
HEATING

RETURN

GAS

SUPPLY

RETURN

FROM
TANK

(OPTIONAL)

DRAIN
POINT

CENTRAL

HEATING

FLOW

DRAIN
POINT

PRESSURE

RELIEF

PRESSURE

RELIEF

CONDENSATE

OUTLET

CONDENSATE

OUTLET

751030 MANUAL (NEW) 21/9/10 08:43 Page 39

COMBUSTION CHAMBER &

6.5

HEAT EXCHANGER

Inspect the inside of the combustion chamber for debris. If necessary,
clean the inside of the tubes with a soft brush. Do not brush the
insulation at the rear, check the integrity of the combustion chamber
insulation panels, if damaged they will require replacement.

CONDENSATE DRAIN

6.6

The condensate Drain has a removable cap, Figure 27, which allows the
removal of debris that may be caught within it. Place a bowl under the
cap to catch the condensate and remove the cap. Any debris inside will
be expelled at this point. Replace the cap ensuring a good seal is made.
Discard the condensate and debris.

DOMESTIC COLD WATER INLET

6.7

FILTER (CBX APPLIANCES ONLY)

Close the water inlet isolating cock, open a domestic hot water tap at
the lowest point in the system and allow the pressure to dissipate. Close
this tap again. Undo the nut holding DHW turbine to the water inlet
isolating cock. The filter inside the isolating cock can now be carefully
removed, and cleaned as necessary by flushing with water. Re-assemble
in reverse order, ensuring all seals are replaced correctly. Refer to
Figure 28.

26A SPARK ELECTRODE

26

TO BURNER

6mm

4mm ±0.5

25

GAS CONTROL VALVE, FAN & BURNER ASSEMBLY

COMBUSTION CHAMBER

FRONT COVER

BURNER

INSULATION

FAN

GAS VALVE

6mm ±0.5

GAS VALVE
FEED PIPE

INLET PRESSURE

TEST POINT

27

751030 MANUAL (NEW) 21/9/10 08:43 Page 40

CBX

24

MANUAL BLEED VALVE

BURNER ASSEMBLY

IGNITION ELECTRODE

IGNITION MODULE

CONDENSATE DRAIN PIPE

FAN

OFFSET ADJUSTMENT SCREW

GAS CONTROL VALVE

GAS VALVE LEAD AND PLUG

FLOW TURBINE

GAS ISOLATING COCK

PRESSURE GAUGE

TIME CLOCK

CONTROL PANEL

FLUE GAS SENSOR

PRIMARY HEAT EXCHANGER

COMBUSTION CHAMBER
FRONT COVER

CH FLOW THERMISTOR
EXPANSION VESSEL

DETECTION ELECTRODE

OFFSET PRESSURE TEST POINT

CH RETURN THERMISTOR

THROTTLE

MAX CO

2

ADJUSTMENT
AUTOMATIC AIR VENT

HYDROBLOCK AND PUMP
CONDENSATE TRAP

FILTER

PLATE HEAT EXCHANGER
PRESSURE RELIEF VALVE

CONTROL BOX

SBX

MANUAL BLEED VALVE

BURNER ASSEMBLY

IGNITION ELECTRODE

IGNITION MODULE

CONDENSATE DRAIN PIPE

FAN

OFFSET ADJUSTMENT SCREW

GAS CONTROL VALVE

GAS VALVE LEAD AND PLUG

GAS ISOLATING COCK

PRESSURE GAUGE

TIME CLOCK

CONTROL PANEL

FLUE GAS SENSOR

PRIMARY HEAT EXCHANGER

COMBUSTION CHAMBER
FRONT COVER

CH FLOW THERMISTOR
EXPANSION VESSEL

DETECTION ELECTRODE

OFFSET PRESSURE TEST POINT

CH RETURN THERMISTOR

THROTTLE

MAX CO

2

ADJUSTMENT
AUTOMATIC AIR VENT

HYDROBLOCK AND PUMP

CONDENSATE TRAP

PRESSURE RELIEF VALVE

CONTROL BOX

26

751030 MANUAL (NEW) 21/9/10 08:43 Page 41

GAS CONNECTION

4.5

Refer to Figure 12

Connect the gas supply pipe to the gas service cock. It is recommended
that a minimum of 22 mm diameter OD copper pipe be used to within
1000 mm of the gas service cock.
For full rate, operate CBX appliances in DHW mode.

CONDENSATE CONNECTIONS

13

WASTE STACK

2.5º

CONDENSATE DRAIN

MUST BE ≥ Ø22

2.5º

CONDENSATE DRAIN

MUST BE ≥ Ø22

SINK WASTE

EXTERNAL PIPE

MUST BE

> Ø32mm

PRESSURE RELIEF VALVE CONNECTION

4.7

The safety valve is located at the bottom RHS of the appliance. Connect
the copper tail provided, to the safety valve outlet, and then connect a
discharge pipe of not less than 15 mm diameter copper to the tail. The
pipe should be positioned so that the discharge of water or steam can be
noticed, but cannot create a hazard to the occupants of the premises or
damage electrical components or wiring.

AIR/FLUE DUCT INSTALLATION

4.8

For correct flue installation please refer to the installation instructions
that are provided with the individual flue kit as described in sections

2.5 - 2.7.
a) Measure the required flue length as shown in Figure 14. Refer to

section 2.5 to determine whether any extension kits are required.
Installations using only the standard ducts or standard ducts with
straight extensions are described in this section. Installation
instructions for all other flue systems are included in the various
flue kits.

b) Ensure that all (inner and outer tube) sealing rings are provided and

assemble the air/flue ducts as shown in the flue instructions.

c) Construct the correct flue length by building the flue out from the

appliance.

Ensure that the flue and air seals are correctly fitted before assembly
and that each section is fully engaged.

The flue length is measured from the centreline of
the appliance flue outlet to the inside of the external
wall-sealing ring. In most cases it will be possible to
achieve the required flue length without cutting the
ducts, however where necessary the plain ends of
the extension ducts may be cut. Never cut the
swaged end, and always ensure that the cut is square
and free of burrs or debris.

NOTE IT IS ESSENTIAL THAT THE TERMINAL IS
FITTED THE CORRECT WAY UP

See flue kit Instructions (i.e. rain shield at the top).

CONDENSATE CONNECTION

4.6

Refer to Figure 13

Connect preferably a 22 mm plastic push fit or adhesive overflow pipe to
the condensate outlet. It should be piped to drain, preferably within the
building, maintaining a continuous 2° fall away from the appliance. Note;
if an additional “U” trap is fitted between the appliance and the
discharge point, then a visible air break is necessary between the
appliance and trap, because a trap is already provided within the
appliance. 32 mm pipe should be used for external pipe work, or if the
appliance is installed in a garage. If the drain is routed externally to a
drain or soak away, then the external length should be kept as short as
possible and not exceed 3000 mm. Protection from freezing in cold
weather conditions is also advisable. Ensure that the condensate
discharge system complies with any local regulations in force.

In exceptional circumstances, such as when a boiler is installed in a
basement without drainage, it may be necessary to install a condensate
pump to carry condensate up to ground/drain level. Such products are
available from Grundfos Pumps Ltd on: 01525 850000 and Pump House
on: 0115 922 2211.

MEASURING THE EXACT FLUE LENGTH

14

L

WALL

FAN OUTLET

EXTERNAL

Dia. 60mm

TOTAL FLUE LENGTH
FROM OUTLET CENTRE
TO OUTSIDE WALL FACE.

= LENGTH

L

19

751030 MANUAL (NEW) 21/9/10 08:44 Page 42

15

INTERNAL WALL

FIBRE
SEAL FITTED

2 ALIGN ASSEMBLED FLUE
SYSTEM ELBOW TO
APPLIANCE AND SECURE

4.8.1

Wall thickness up to 800 mm (31in) only.

a) Push the terminal through the wall liner taking care to ensure that

b) Assemble the flue system extension ducts as necessary, referring

c) Pull the flue system towards the appliance to seat the external

d) Use the internal sealing ring to make good the internal hole, and

e) Finally locate and secure the elbow to the appliance using the four

INSTALLING THE AIR/FLUE DUCT
FROM INSIDE THE ROOM

the terminal is the correct way round and the external wall-sealing
ring does not become dislodged.

to Figure 15.

sealing ring against the outside wall, ensuring that the duct joints
are not disturbed.

check that the terminal is correctly located on the outside wall
(Where possible this should be visually checked from outside the
building.) Figure 16 shows a view of the flue system, correctly
installed.

screws provided.

130mm Dia.
HOLE WITH

WALL LINER

SEALING RING

1 INSERT
ASSEMBLED
FLUE SYSTEM

3 SLIDE
INTERNAL
WALL
SEALING RING
TO WALL TO
FORM A GOOD
SEAL

4.9

Connect the electricity supply and external controls (using suitable
mains cable) as follows:

Wire the cable(s) into the appropriate connections in the electrical plug
provided, referring to Figure 16. Live supply to L1, Neutral and Earth as
indicated. Check that L2 and L3 are linked.

To provide correct cable retention, fit the piece of tubing supplied over
the cable as it passes through the clamping arrangement. The cable will
be held in position as the plug cover is fitted.

If a programmer/room thermostat is to be fitted remove the red link
between L2 and L3 and connect the device across these terminals. Any
external controls fitted must be rated at 230V 50Hz and have volt free
contacts.

FROM INSIDE
THE ROOM.
EXTERNAL
WALL
SEALING RING
OPENS

ELECTRICAL CONNECTIONS

TOP

EXTERNAL WALL
SEALING RING

16

4.8.2

INSTALLING THE AIR/FLUE DUCT
FROM OUTSIDE THE ROOM

(Flue hole diameter 100 mm - wall liner not necessary)

a) Secure the flue elbow with seal to the appliance using 4 screws.
b) Fit external wall sealing ring over flue and then from outside the

building, push the flue system through the wall taking care to
ensure that the terminal is the correct way around.

c) Loosely fit the internal wall sealing ring over the inside end of the

flue.

d) Assemble the flue system extension ducts as necessary, referring

to the flue kit instructions, and fit to the flue elbow.

e) Fit the flue terminal to the flue system, ensuring that the duct joints

are not disturbed, and that the external sealing ring is seated
against the outside wall.

f) Finally use the internal sealing ring to make good the internal hole.

Check that the external wall sealing ring and the terminal is
correctly located, on the outside wall from outside the building.

20

NOTE: If room
thermostat is to be
fitted, remove the link
and connect room
thermostat across L2
and L3

4.10

OPTIONAL CYLINDER/TANK TEMPERATURE
SENSOR (SBX APPLIANCES ONLY)

If this sensor kit is used, refer to the separate kit for instructions for
installation and wiring details.

751030 MANUAL (NEW) 21/9/10 08:44 Page 43

6

To ensure continued efficient operation of the appliance, it is
recommended that it is checked and serviced as necessary at regular
intervals. The frequency of servicing will depend upon the particular
installation conditions and usage, but in general once a year should be
adequate. It is the law that a competent person, such as British Gas or
other CORGI registered personnel, must carry out any service work.

Service the appliance by following the full procedure detailed below:

6.1

The appliance incorporates a flue sampling point on the appliance flue
elbow, or appliance vertical flue adaptor. If the service engineer has
suitable equipment to analyse the flue gas, the plastic cap may be
removed and a 6 mm inside diameter sample tube fitted. For CBX
appliances operate in DHW mode, at full rate, for SBX appliances
operate the appliance in Service mode, (see section 5.2). After ten
minutes operation check the CO
figures stated in section 2.3. Do not forget to replace the cap after use.

When the appliance is operating at maximum output check that the gas
supply pressure is 20.0 mbar, using the inlet pressure test point located
on the gas supply pipe.

Before commencing any service operation, ISOLATE the mains electrical
supply, and TURN OFF the gas supply at the main service cock.

6.2

ROUTINE SERVICING

COMBUSTION CHECK

/CO values and compare with those

2

GAS CONTROL
VALVE, FAN & BURNER ASSEMBLY

Refer to Figures 22, 23, 24, and 25
a) Remove the casing front panel, pulls off.
b) Lower the controls panel (2 screws).
c) Remove the sealed chamber front panels (11 screws).
d) Disconnect the igniter plug, earth lead and detection plug from the

igniter and detection electrodes.

e) Unscrew the screw holding the gas valve lead plug, and disconnect

the plug.

f) Disconnect the electrical leads from the fan (2 plugs).
g) Undo the nut holding the gas valve feed pipe to the gas isolating

cock, and disconnect.

h) Disengage the gas valve feed pipe grommet from the casing by

pushing it up.

i) Remove the 6 nuts holding the combustion chamber front cover in

place.

j) Remove the gas control valve, fan & burner assembly, by carefully

pulling forward the combustion chamber front and rotating the
assembly anticlockwise so that the burner points forward, then
disengage the gas valve feed pipe from the casing, by lifting up the
assembly. Take care not to damage the insulation.

k) The assembly may then be inspected.
l) Re-assemble in reverse order.

BURNER

6.3

Inspect, and if necessary clean the main burner ports using a soft brush
or vacuum cleaner. Do not use a wire brush or any abrasive material.

IGNITION & DETECTION ELECTRODES

6.4

a) Inspect the ignition and detection electrodes in situ. If necessary, clean

using a soft brush. If either the electrode or the ceramic insulation
shows signs of damage or wear, replace the electrode(s) and their
gasket.

b) Check that the alignments of the ignition and detection electrodes are

correct. Refer to Figure 26. Adjust by carefully bending the tip of the
electrode rod whilst supporting the base of the rod. Do not put any
pressure on the ceramic insulation.

22

CONTROL PANEL

FIXING SCREWS

COMBUSTION CASE PANELS

23

FIXING SCREWS

25

751030 MANUAL (NEW) 21/9/10 08:44 Page 44

OTHER FEATURES

5.8

The following additional features are included in the appliance
specification:

ANTI-CYCLE DEVICE:

When the appliance cycles on its central heating control thermostat, a
slow cycle device operates. The timer (set to 5 minutes) is activated after
the end of each burn cycle to prevent rapid cycling of the burner.

ANTI PUMP SEIZURE DEVICE:

Providing that a power supply is maintained and the appliance ON/OFF
switch is ON, the pump will operate for at least 20 seconds in every 23
hours (regardless of heat demand) to prevent pump seizure during
periods where the appliance is not used.

CH SOFT START DEVICE:

After every burner start, in CH mode, the burner output stays at low for
3 minutes, to ensure smooth heat up of the system and maximum
efficiency.

DHW PRE-HEAT: (CBX appliances only)

DHW Comfort selected: With no demand for DHW the appliance will fire
periodically for a few seconds to maintain the DHW plate heat exchanger
in a heated condition. This feature will automatically adjust to the user's
habitual requirements. Thus during long periods of no DHW draw-off,
e.g. overnight, no pre-heat is provided. With DHW Economy selected, no
pre-heat is provided.

KEEP-HOT FACILITY (EDEN CBX appliances only)

This feature is designed to provide hot water very quickly without
wasting too much water. Therefore you may notice that after EVERY hot
water draw-off the burner may stay on for a short period of a few
seconds. This is to pre-heat the hot water circuit and prepare the
appliance for the next hot water draw-off.

This feature applies in both the 'Comfort' and 'Economy' modes.

OPTIONAL - HOT WATER DELAY PERIOD (EDEN CBX appliances only)

After every hot water draw-off the appliance may stay in this mode for
a few minutes, (if selected), even though a central heating demand is
present (LED 3 & 4, as shown in the user manual, will be off during this
period). This feature reduces the hot water outlet temperature
fluctuations between draw-offs. This feature is particularly handy when
having a shower.

In households with many hot water taps or larger families this feature
could cause some unwanted delays in providing central heating. To
override the few minute delay, briefly turn the CH control knob or room
thermostat (if fitted) and the appliance will change over to CH almost
immediately, (at least 1 minute after last burner cycle).

SERVICE MODE:

The appliance enters the SERVICE mode by turning the control knob to
'SERVICE' (full clockwise). The two LED's above the knob are now
flashing. In this mode the appliance runs at the minimum CH output.
This mode allows the gas valve offset and CO
measured.

USER INSTRUCTIONS

5.9

Upon completion of commissioning and testing the system, the installer
must instruct the user in how to operate the appliance by drawing the
user's attention to the following.

a) Give the 'Users Instructions' to the householder and emphasise their

responsibilities under the 'Gas Safety (Installation and Use)
Regulations or rules in force.

b) Explain and demonstrate the lighting and shutdown procedures.
c) Advise the householder on the efficient use of the system, including

24

the use and adjustment of all system controls for both CH and DHW.

emissions to be

2

d) Advise the user of the precautions necessary to prevent damage to

the system, and to the building, in the event of the system remaining
inoperative during frost conditions.

e) Explain the function of the Reset button, and how to reset the

appliance. Emphasise that if cutouts persists, the appliance should
be turned off and the installer or service engineer consulted.

f) Stress the importance of an annual service by a registered heating

engineer.

g) The electrical mains supply to the appliance must remain ON and

the ON/OFF switch must be left ON for the frost protection circuit to
operate.

5.10

A logbook is supplied with this appliance to record installation and
commissioning details and to make future servicing of the appliance
easier.

This logbook forms part of the industry's Benchmark code of practice
for the installation, commissioning and servicing of central heating
systems.

Please ensure that the logbook is fully completed and left with the
customer for future reference, along with Users Instructions and this
Installation and Servicing Instruction manual.

5.11

Appliances may be converted from one gas group to another. It is
possible to convert between Propane and Natural gas by use of
conversion kits. The kits comprise the following:

Propane to Natural Gas

Kit Numbers 955123 - Eden CBX 32

Natural Gas to Propane

Kit Numbers 955120 - Eden CBX 32

Instruction on how to convert the appliance is given in the conversion
instructions supplied with these kits. However, particular attention
should be given to the fitting of the gas valve and the use of the Boiler
Chip Card (BCC).

For further information contact: Halstead Boilers Ltd, Service Help Line:
0844 371 1111.

APPLIANCE LOG BOOK

GAS CONVERSION

955124 - Eden CBX 24
955125 - Eden SBX 30
988642 - Eden CBX 38
Conversion Instructions
Gas Control Valve
Data Badge (Natural Gas)
Boiler Chip Card Nat Gas
Cork Gasket
Polydome Badge (Natural Gas)

955121 - Eden CBX 24
955122 - Eden SBX 30
988641 - Eden CBX 38
Conversion Instructions
Gas Control Valve
Data Badge (Propane)
Boiler Chip Card Propane
Cork Gasket
Polydome Badge (Propane)

751030 MANUAL (NEW) 21/9/10 08:44 Page 45

5

5.1

Before commissioning the appliance, the whole gas installation
including the meter MUST be purged and tested for gas tightness in
accordance with BS 6891: 1988.

!

Before commencing the commissioning procedure, ensure that the gas
service cock is turned on, the electricity supply is isolated, and that the
CH and DHW pipe-work (where fitted) is complete. A special feature of
the CBX appliances is that the water systems can be completely filled
prior to fitting the appliance. It is recommended that this procedure be
followed even when the appliance is to be fitted immediately after filling
the system. Fill the water systems by following the procedure detailed
below steps 1 to 5, and referring to Figure 17.

17

COMMISSIONING & TESTING

FILLING THE WATER SYSTEM

Open all doors and windows, extinguish naked lights,
and DO NOT SMOKE whilst purging the gas line.

It is recommended, where possible, to flush the CH
system without the appliance fitted, to avoid debris
and flux blocking the waterways within the
appliance.

COMMISSIONING THE WATER SYSTEM

1) Check that the CH flow, return, (and DHW return on SBX appliance

if used), isolating valves are in the open position.

2) Fill the system with water using one of the approved methods

described in section 3.7 to about 2.0 bar, (filling loop provided on
CBX appliances). Vent the system via the radiator valves and system
air vents in accordance with normal practice. Ensure that all system
air vents are closed.

To aid venting, a manual air vent is provided on the
LHS of the heat exchanger, and an automatic air vent
on the pump assembly.

3) Check the system for soundness.

4) Check the operation of the pressure relief valve (Figure 18) by lifting

the lever on the valve gently to ease the valve off its seat. Checking
that water is discharged, release the lever and ensure that the valve
seats correctly and does not leak.

Do not use the pressure relief valve to drain the
system, because dirt or debris could prevent the
valve seating correctly. If the valve leaks or sticks
closed, then replace it.

18

CH RETURN

WATER IN

CH RETURN

COLD

FILLING

LOOP

VALVE

GAS

SUPPLY

RETURN FROM

TANK (OPTIONAL)

DHW
FLOW

GAS
SUPPLY

SECONDARY

FLOW

CH
DRAIN

CH
DRAIN

CH

FILLING
LOOP

CH
FLOW

FILLING
LOOP
VALVE

CONDENSATE

WASTE

OUTLET

(NOTE: TRAP

PARTS FITTED

INSIDE BOILER

NOT ON

PLUMBING JIG)

CONDENSATE

WASTE OUTLET

(NOTE: TRAP PARTS

FITTED INSIDE
BOILER NOT ON
PLUMBING JIG)

PRESSURE

GAUGE

CAPILLARY

5) Drain the entire system to flush out any debris, and refill to 0.2 bar

above the system design pressure (between 0.5 and 1.5 bar) by
repeating the above procedure. Follow the commissioning
procedure described below, and then repeat this instruction with
the system hot. It is recommended that the system be cleaned with
a recognised system cleaner such as Fernox or Sentinel.

6) On CBX appliances, open the DHW inlet valve and operate each hot

water tap in turn to clear all the air from the pipes and the
appliance.

7) Remove the pump cap; use a screwdriver to rotate the pump shaft.

Replace the cap.

8) Disconnect the filling loop from the system.

9) Prior to lighting the appliance to check the gas rates, the central

heating system should be checked for circulation by operating the
appliance with the gas turned off, this is to ensure that no air locks
occur. The appliance may go into ignition lockout and require
resetting.

PRESSURE

RELIEF

VALVE

21

751030 MANUAL (NEW) 21/9/10 08:44 Page 46

COMMISSIONING THE APPLIANCE

5.2

NOTE: The combustion values at minimum gas rate

and maximum gas rate must be checked using a
suitable calibrated flue gas analyser. Compliance
with BS7967-2, BS7967-3 and BS7967-4 is essential.

Combustion checks at minimum gas rate
a) To check the flue gas levels at minimum gas rate it is necessary to

set the boiler into ‘Service Mode’ (Fig. 19b).

NOTE: Service mode automatically stops after 10
minutes and the boiler returns to normal operation.

b) Turn the CH knob fully clockwise - Note the knob will turn past the

maximum temperature mark to ‘Service mode’ (Fig. 19b).

c) The two CH lights (3&4) will flash continuously - the boiler is now

running at minimum rate.

d) Check the Carbon Monoxide (CO) and Carbon Dioxide (CO

) readings

2

are within the range quoted in table 2.3 on page 3.

NOTE: If the combustion levels are outside the
range quoted in table 2.3 see Adjustment of the Gas
Valve opposite.

Combustion checks at maximum gas rate
e) To check the combustion gas levels at maximum gas rate, place the

boiler into ‘Service mode’ as explained above.

f) Now turn the CH knob to the 12 o’clock position and then back fully

clockwise into ‘Service mode’ within 3 seconds. The boiler will now
run at maximum gas rate for 10 minutes.

Adjustment of the Gas Valve

NOTE: DO NOT ATTEMPT TO ADJUST THE GAS VALVE

UNLESS YOU HAVE A SUITABLE PORTABLE
COMBUSTION GAS ANALYSER THAT IS CHECKED
AND WITHIN CALIBRATION. COMPLIANCE WITH
BS7967-2, BS7967-3 AND BS7967-4 IS ESSENTIAL.

g) With the front door fitted, put the boiler into ‘Service Mode’ at

maximum gas rate-see points e & f opposite. If the Carbon Dioxide
(CO

) level is outside the required values, adjust the throttle

2

adjustment screw (Fig. 19a) Clockwise to decrease CO
Clockwise to increase CO

h) When the CO

level has stabilised, check the Carbon Monoxide (CO)

2

.

2

or Anti-

2

level is within the range shown in Table 2.3 on page 3.

IMPORTANT: After any adjustment of the gas valve,
it is essential to check the combustion levels at

!

minimum gas rate (table 2.3). If the Carbon Monoxide
or Carbon Dioxide levels are outside the range
quoted, call Halstead Boilers Ltd Technical Helpline
on 0844 371 1111. If in doubt ASK!

19a

NOTE: FACTORY SET

Gas Valve

DO NOT ADJUST

- warranty void if
adjusted

Throttle
Adjuster

Screw

22

NOTE: Check the Carbon Monoxide and Carbon

Dioxide levels are within the range quoted in table 2.3
on page 3.

FASCIA PANEL AND CONTROLS (CBX model shown)

19b

24hr Clock

Pressure

Gauge

DHW Economy/
Comfort Switch

DHW Temperature

Economy/Comfort

Error Code LED (1&2)

Control

Service

Function

CH Temp.
Control

Error Code
LED (3&4)

TABS OUT
= ON PERIOD

TABS IN
= OFF PERIOD

BURNER ON (Blue)
ERROR (Red)
LED and Reset push Button

Mains ON/OFF

Inlet Test Point

CLOCK OVERRIDE
SWITCH (Heating
only)

Switch

= Continuous ON
= Timed
= OFF

CURRENT TIME

ARROW

INDICATES

751030 MANUAL (NEW) 21/9/10 08:44 Page 47

20

NOTE:
On the CBX 38, the
inlet pressure test
point is situated on
the gas service cock.

INLET PRESSURE TEST POINT

DHW FLOW RATE (CBX APPLIANCES ONLY)

5.3

A flow regulator is supplied factory fitted to the appliance to ensure that
no adjustment is necessary. Should the mains flow rate be below the
minimum required, it is possible to remove the flow regulator from the
appliance as instructed in section 9. The nominal pre-adjusted flow rate
may vary by ± 5 % due to factory tolerances and mains water pressure
fluctuation.

FINAL CHECKS

5.4

a) Turn both the DHW and CH temperature control knobs to standby.
b) Turn the appliance on/off switch to the off ('O') position, remove the

manometer and tighten the appliance inlet pressure test point
screw. Re-light the burner and test for gas tightness.

c) Fit the appliance casing as described and illustrated in Figure 21: Fit

each side panel with two screws at the top and bottom of each panel.
Position and fit controls cover in place using screws provided.
Ensure it hinges correctly. Fit the front panel in position using
locating studs and ensure it’s correctly seated by pressing.

d) Set the heating and hot water controls to the required settings. For

CBX appliances ensure that the clock override switch is in the timed
position and check that the time clock is set at the desired time
periods. Set the room thermostat (if fitted) to the required setting.

e) For SBX appliances if the cylinder / tank sensor if fitted set the hot

water sensor to the required setting. Refer to separate cylinder /
tank sensor instructions.

LOCKOUT INDICATION

5.5

In the event of failure during an ignition sequence, (5 attempts) the
Reset LED will show steady RED. By pressing and holding the Reset
button for 3 seconds the Reset LED will flash RED and LEDs 1 to 4 will
display the error code (0011). To Reset the appliance and initiate a
further ignition attempt, press the Reset button.

NOTE: In the event of failure during normal running, the Reset LED will
show steady RED.

To access the relevant error codes, press the Reset button for three
seconds. The Reset LED will flash RED. To reset the appliance press the
Reset button. Refer to 'fault finding' Section 8.

FROST PROTECTION

5.6

The appliance is fitted with a frost protection device. In the event of very
cold conditions, the pump may operate and the appliance light for a few
minutes to protect the appliance and system from potential frost
damage. This can only function if the gas and electricity supplies are
maintained and the ON/OFF switch on the appliance is left ON. (‘l’) On
CBX appliances the time clock can be switched to the OFF setting.

OVERHEAT PROTECTION

5.7

The appliance incorporates flow and return thermostats, which monitor
the appliance's operating temperature. Abnormal temperatures such
as overheating will cause the appliance to go to lockout and the Reset
button will show steady RED, if the error codes are accessed the LED 4
(code 0001) will illuminate. Allow the appliance to cool, and then press
the Reset button to clear.

21

CASING

LOWER DOOR
HINGE FIXINGS
(M4 SCREWS)

SIDE PANEL

SECURING SCREWS

(4 PER SIDE)

BALL STUD

RUBBER GROMMET

GROMMETS
(3 PER SIDE)

RUBBER

BALL STUDS
(3 PER SIDE)

23

751030 MANUAL (NEW) 21/9/10 08:44 Page 48

Glen Dimplex Boilers, Stoney Lane, Prescot Merseyside L35 2XW.

For telephone enquiries call: 0844 371 1111.

Website: www.glendimplexboilers.com

Part of the Glen Dimplex Group

Glen Dimplex Boilers is continuously improving its products and may therefore change specifications without prior notice.

The statutory rights of the consumer are not affected.

03/10 751030 Issue 4

SALES AND SERVICE HELPLINE: 0844 371 1111